Problem: SanDisk manufacturers computer flash drives, camera memory cards, and other types of mobile storage products. Although SanDisk could make better margins if it exclusively sold direct-to-consumers, SanDisk should sell its products through retailers who also sell computers and cameras so that customers can add-on memory accessories when buying a computer or camera. Which condition for using an intermediary does this best describe? a. Size and distribution of end user b. Role of the product in the purchasing basket c. Nature of product or service d. Nature and size of the producer e. Business strategy of the producer