A buyer's right to reject goods upon the seller's failure to comply with the perfect tender rule is qualified by which of the following conditions?

A. The parties may contractually agree to limit the operation of the perfect tender rule.
B. The Code gives the seller a right to cure in all situations.
C. Under an installment contract that is silent about payment, the buyer does not have to pay the price of individual lots of the goods, but can wait until the seller has delivered or tendered the entire quantity specified in the contract before making any payment.
D. All of the above.

The buyer's right to reject goods upon the seller's failure to comply with the perfect tender rule is qualified by the conditions listed in options A, B, and C.

Explanation:

The buyer's right to reject goods upon the seller's failure to comply with the perfect tender rule is qualified by the following conditions:

The parties may contractually agree to limit the operation of the perfect tender rule.
The Code gives the seller a right to cure in all situations.
Under an installment contract that is silent about payment, the buyer does not have to pay the price of individual lots of the goods, but can wait until the seller has delivered or tendered the entire quantity specified in the contract before making any payment.

Therefore, the answer is option D. All of the above.