Final answer:
The MCAP members can receive a 1% discount on their purchases at Staples, Office Depot, and Amazon Business. These retailers are part of the program that offers discounts to its members. Option D is correct.
Step-by-step explanation:
Members of the MCAP (which the context does not specify but could stand for a type of membership or buyer's club) looking to receive a 1% discount on their purchases can make transactions at various retailers. Each of these retailers, including Amazon Business, provides a platform for such discounts to be utilized in favor of the program's members.
The details provided about Amazon demonstrate how modern advancements in logistics and economies of scale have allowed companies to pivot from traditional brick-and-mortar bookstore models to innovative online marketplaces with highly computerized warehouses.
This background information about Amazon showcases how such companies could potentially offer discounts through membership programs like MCAP.