Final answer:
Edna must pay when she receives notification that the goods have been shipped. The correct option is d.
Step-by-step explanation:
Edna must pay when she receives notification that the goods have been shipped. The correct option is d.
In this scenario, the contract between Edna and Northwestern Catalog does not specify when payment is due. Therefore, the default rule would apply, which is that payment is due upon receipt of the goods or notification of shipment.
Option D states that Edna must pay when she receives notification that the goods have been shipped. This is the correct answer because Edna should not be required to pay until she is informed that the goods have actually been sent to her.