Advances in Technology/Exchange After 1900 Practice Test

In the twentieth century, many states invested in public transportation systems like subways and buses, while others prioritized highways. These choices shaped urban form, commuting patterns, and pollution levels. Which statement best explains why some cities after 1900 developed extensive subway systems?

From the 1970s onward, many economies shifted toward flexible manufacturing, just-in-time inventory, and global sourcing. Computers helped coordinate production schedules and track shipments, while trade liberalization reduced tariffs in many regions. Which development best explains how firms were able to disperse manufacturing across multiple countries after 1900?