Under UCC Section 2-301, the seller's basic obligation is to transfer and deliver conforming goods, and the buyer's basic obligation is to accept and pay for them. Conforming goods are those that meet every aspect of the contract description (quantity, quality, specifications, and delivery terms). The seller must make tender of delivery - placing conforming goods at the buyer's disposal and giving reasonable notification so the buyer can take delivery. Answer A incorrectly specifies the delivery location. Answer C is incorrect because written warranties are not always required. Answer D is incorrect because there is no automatic one-year return right.

Under UCC Section 2-503(1), tender of delivery requires the seller to put and hold conforming goods at the buyer's disposition and give the buyer any notification reasonably necessary for the buyer to take delivery. This must be at a reasonable hour and for a reasonable period. Proper tender entitles the seller to acceptance and payment in accordance with the contract. Answer A is incorrect because the seller cannot wait indefinitely. Answer C is incorrect because notification is required. Answer D describes one form of tender (through a document of title) but overstates it as the general rule.

Under UCC Section 2-511(1), unless otherwise agreed, payment is due at the time and place at which the buyer is to receive the goods. The buyer must tender payment concurrently with the seller's tender of delivery - the exchange is simultaneous. Payment may be made by any means or in any manner current in the ordinary course of business, but the seller may demand payment in legal tender and give a reasonable time extension to obtain it. Answer A imposes a 30-day rule not found in the UCC. Answer B is incorrect because payment need not await post-inspection acceptance in all cases. Answer C is incorrect because written extensions are not automatically available.

Under UCC Section 2-714(2), the measure of damages for breach of warranty is the difference between the value of the goods as accepted (what the non-conforming goods are actually worth) and the value they would have had if they had been as warranted (what conforming goods would have been worth), plus any incidental and consequential damages under Section 2-715. This formula compensates the buyer for the deficiency in value. Answer A is incorrect because the buyer recovers the value shortfall, not the full price. Answer B is incorrect because accepted goods may still support warranty damages with timely notice. Answer D is only the repair cost, which may understate the damages.

Under UCC Section 2-507(1), tender of delivery is a condition to the buyer's duty to accept the goods and, unless otherwise agreed, to the buyer's duty to pay for them. Tender and payment are concurrent conditions - neither party need perform first. The seller's proper tender triggers the buyer's obligation. Answer A incorrectly allows pre-delivery payment demands. Answer B is incorrect because payment is not automatically delayed pending inspection. Answer C invents a 90-day payment window not found in the UCC.

Under UCC Section 2-312, the warranty of title is implied in every contract for sale unless specifically disclaimed. It warrants: (1) good title is conveyed; (2) the transfer is rightful; and (3) the goods are free from any security interest, lien, or encumbrance of which the buyer at the time of contracting had no knowledge. Answer B describes a performance warranty, not a title warranty. Answer C incorrectly includes liens the buyer knew about; known liens are not covered by the warranty. Answer D is incorrect because the warranty of title is implied and does not require a separate written statement.

Under UCC Section 2-510(1), when a tender or delivery of goods fails to conform to the contract such that the buyer has a right of rejection, the risk of loss remains on the seller until cure or acceptance. This prevents the seller from transferring risk to the buyer through non-conforming tender. If the seller cures the defect or the buyer accepts despite the non-conformity, risk then passes to the buyer. Answer A reverses the rule; the risk stays with the breaching seller, not the buyer. Answer B is incorrect because conforming tender is required for risk to pass in a shipment contract. Answer D (shared risk) has no basis in Article 2.

Under UCC Section 2-501, identification of goods to a contract gives the buyer a special property interest in the identified goods and an insurable interest in them. Once goods are identified, the buyer may: (1) seek specific performance or replevin in cases where the goods are unique or the buyer is unable to cover; (2) recover goods under Section 2-502 if the seller becomes insolvent within 10 days of the buyer's first installment payment; and (3) recover damages based on market price at the time of identification. Answer B is incorrect because identification does not automatically transfer title. Answer C is incorrect because identification has significant legal effects. Answer D is incorrect because identification commits those specific goods to the contract.

Under UCC Section 2-716(1), specific performance may be decreed where the goods are unique or in other proper circumstances. Unique goods include rare art, custom-made items, or goods that cannot be purchased elsewhere. 'Other proper circumstances' may include situations where the market for the goods has dried up, the buyer cannot obtain substitute goods, or the goods have special characteristics that make cover impossible. Answer A is incorrect because specific performance requires uniqueness or inability to cover, not mere preference. Answer B (90-day rule) is not in the Code. Answer D (dollar threshold) is not a UCC requirement.

Under UCC Section 2-608, revocation of acceptance requires: (1) the non-conformity substantially impairs the value of the goods to the buyer; and (2) the buyer accepted because they reasonably assumed the seller would cure, or because the non-conformity was difficult to discover before acceptance. Revocation must occur within a reasonable time after the buyer discovers or should have discovered the grounds, before any substantial change in condition of the goods. Answer A invents a one-year period. Answer B (change of mind) has no basis in the Code. Answer C is too narrow; the non-conformity need not have existed at delivery if it subsequently emerged and was difficult to discover.