During New Imperialism, European powers employed various methods to extend their influence, often starting with indirect control to minimize costs and resistance before resorting to direct annexation. The scholar's excerpt emphasizes justifications like Social Darwinism, which portrayed Europeans as racially superior and duty-bound to 'civilize' others, alongside coercive tactics such as gunboat diplomacy and unequal treaties. Protectorates were a common method where local rulers retained nominal authority, but key powers like foreign policy and trade were ceded to the European power, allowing indirect domination. This approach preserved a facade of local sovereignty while ensuring European control over strategic and economic interests. The description matches option A, as it describes protectorates that transferred key powers while keeping local authority in name only. In contrast, options like voluntary federations or immediate decolonization do not align with the coercive and expansionist nature of these methods. Understanding these tactics helps explain how empires grew rapidly without always committing to full military occupation initially.

Strategic concerns were pivotal in New Imperialism, as advancements in technology like steamships and telegraphs necessitated secure global networks for trade and military projection. The historian argues that steam navies required coaling stations for refueling, and controlling key chokepoints like the Suez Canal was essential for maintaining sea lanes and communication lines. Military innovations, such as rapid-fire weapons, lowered the barriers to conquest, enabling smaller forces to subdue larger populations. This focus on bases and ports ensured that empires could protect their interests and respond quickly to threats from rivals. Option B directly aligns with this by describing the acquisition of bases and ports to secure sea lanes, matching the argument's emphasis on strategic objectives. In contrast, eliminating navies or ending trade would contradict the expansionist goals. These elements show how technology and strategy intertwined to facilitate imperial growth.

New Imperialism blended diplomatic negotiations with coercive force, using conferences like the Berlin Conference of 1884-1885 to establish rules for African partition, emphasizing 'effective occupation' as proof of legitimate claims. This standard required establishing administrative and military presence to validate control, often involving expeditions and treaties signed under duress. The historian's explanation highlights how these methods ensured recognized sovereignty amid competition. Option A best fits by describing the establishment of administrative and military posts for effective occupation. Options like recognizing indigenous sovereignty or limiting to missionary activity do not match the expansionist approach. This concept prevented mere flag-planting and encouraged actual governance. It underscores the formalized yet aggressive nature of imperial methods.

New Imperialism marked a shift from earlier mercantilist empires, which focused on trade monopolies, to a more aggressive form influenced by industrialization and mass politics in the late 19th century. The textbook author points out that unlike previous eras, imperial expansion was fueled by domestic pressures, where governments used overseas ventures to gain public support through promises of jobs, national prestige, and security. Nationalism played a key role, as mass media and political parties rallied citizens around imperial successes, making expansion a tool for domestic stability. Great-power rivalry added urgency, as nations competed for colonies to avoid being outpaced, even if profitability was not immediate. This factor is best represented by option B, which highlights how domestic politics and nationalism made imperialism popular. Options like religious objectives or reduced industrial production do not capture the political motivations emphasized. This illustrates how internal European dynamics intertwined with global expansion during this period.

Economic motivations were central to New Imperialism, with European powers seeking raw materials for industries and markets for surplus goods amid overproduction crises. Colonies provided resources like rubber and metals, while policies ensured they served as captive markets through exclusive arrangements. The secondary source notes tariff walls and contracts that favored metropolitan firms, protecting them from competition. Option B illustrates this with preferential tariffs and exclusive trading rights, aligning with the method of creating protected markets. In contrast, unrestricted access or banning extraction would undermine these goals. These policies integrated colonies into global capitalism on unequal terms. They highlight how imperialism supported industrial economies at the expense of colonial development.

New Imperialism, occurring roughly between 1870 and 1914, was a period when European powers expanded their control over vast territories in Africa, Asia, and the Pacific, driven by a combination of economic, strategic, and ideological factors. The historian's summary highlights industrial capitalism's need for raw materials like rubber and cotton, as well as captive markets to sell manufactured goods, which directly points to economic motivations as a core driver. This era saw European industries booming due to the Second Industrial Revolution, creating a demand for resources that domestic supplies couldn't meet, thus pushing for overseas expansion. Strategic rivalry involved securing coaling stations and naval routes to protect trade and military interests, while ideological claims like the 'civilizing mission' and Social Darwinism provided moral justifications for domination. Methods such as chartered companies, unequal treaties, and protectorates were initial tools before direct rule, often escalating due to resistance or competition. Among the choices, option B best captures the economic motivation of securing raw materials and markets, as it aligns precisely with the summary's emphasis on industrial needs. The other options, like restoring feudalism or abolishing tariffs, do not reflect the historical drivers described.

Chartered companies were instrumental in New Imperialism, acting as bridges between private enterprise and state power to facilitate expansion without full government commitment initially. These entities, like the British East India Company or the Royal Niger Company, were granted monopolies and administrative rights by governments to explore, trade, and even govern territories. They negotiated treaties, built infrastructure, and sometimes engaged in military actions, paving the way for formal colonization when profitable or necessary. The secondary source notes how financiers and manufacturers pushed for such influence to safeguard investments, with states using these companies as agents before annexation. Option A accurately describes their role as state-backed organizations administering territory and treaties. Options like labor unions or religious orders do not fit this historical function. This method allowed European powers to expand efficiently while sharing risks with private investors.

Informal empire was a key initial stage of New Imperialism, where European powers exerted control through economic means rather than direct political rule, often to avoid the costs of full occupation. This involved dominating trade, loans, and customs revenues in regions like Latin America or the Ottoman Empire, using financial leverage to influence policies without annexation. The historian explains that instability or rival interventions could lead to formal rule, but informal methods allowed for profit extraction with less commitment. This concept is best captured by option A, which describes economic imperialism via financial and trade dominance. In contrast, autarky or abolition of property would oppose the integrative economic goals of imperialism. Understanding informal empire highlights how economic power preceded territorial control in many cases. It also shows the continuum from influence to domination in imperial strategies.

Ideological motivations in New Imperialism provided a moral and intellectual framework for expansion, often masking economic and strategic interests. The 'civilizing mission' posited that Europeans had a duty to bring education, Christianity, and modern governance to 'backward' peoples, intertwined with Social Darwinism's ideas of racial hierarchies and survival of the fittest. Missionaries and reformers promoted these views, framing empire as benevolent, though in practice it enabled exploitation. The scholar's summary directly describes this justification, as seen in option B, which ties the civilizing mission to racial and Darwinist thinking. Options like divine right or Marxism do not align with the era's dominant ideologies. These ideas helped garner public support and legitimize aggressive policies. Critically, they often ignored or justified the violence and inequality inherent in imperialism.

New Imperialism often involved diplomatic methods among European powers to manage expansion and avoid conflict, such as through multilateral conferences. The Berlin Conference of 1884–1885 exemplified this, where European states negotiated the partition of Africa, establishing rules for claims while excluding African representatives. This event formalized the Scramble for Africa and reduced immediate rivalries by agreeing on spheres of influence. It reflected a method of legalistic imperialism that prioritized European interests. Choice B is the best match, as it directly pertains to this conference. Other options, like A or C, refer to earlier events unrelated to 19th-century imperialism. This approach demonstrates how imperialism was as much about European diplomacy as conquest.