Answer: D. Perfect tender rule
Explanation: In the United States, it is the legal right of buyers to insist upon perfect tender by the seller be it quality, quantity, or manner of delivery. This falls under the rule of perfect tender which states that, in contracts for the sale of goods, the seller must supply the buyer with goods that conform perfectly to the buyer's demands in quality, quantity or manner of delivery and the buyer reserves the right to nevertheless accept the goods, or reject the goods, or reject the nonconforming part of the tender and accept the conforming part if they don't conform to the description of the contract. However, there are exceptions to the rule: If the contract date has not been exceeded, the seller has the right to notify the buyer that the imperfect tender will be put in order before the specified date of delivery.