11. A division of a major publisher specializes in publishing and selling study guides for college students through distribution channels such as major bookstore chains, independent bookstores, and ecommerce sites. Sales representatives activities include visits to bookstores that carry the products and setup of eye catching in-store displays. Which of the following cost classifications would those activities fall into: A) customer-sustaining costs B) customer batch-level costs C) distribution-channel costs D) division-sustaining costs