UCC Rules on Acceptance of Goods and Payment in Regard

UCC rules on acceptance of goods and payment in regard to installment contracts mandate that

A) acceptance is not made until all shipments are received and then payment is made.
B) acceptance is made separately for each shipment, but payment is not due until the final shipment is received.
C) payment must be made in advance, and acceptance occurs after all shipments are received.
D) acceptance is made separately for each shipment, and payment for each shipment is due on delivery of that shipment.