For a Bookseller That Sells Entirely Through a Web Site

For a bookseller that sells entirely through a Web site, managing the diversity of customers would entail which of the following?

A) Adopting lean techniques to reduce cycle time II. Continually developing new service features to take the place of services that have become "must haves" III. Responding to the needs of a diverse customer base IV. Understanding and working closely with multiple publishers
B) III only
C) II and III only
D) II, III, and IV only
E) I, II, III, and IV