With the Introduction of E-Books, Distributors Could Still Set Their

With the introduction of e-books, distributors could still set their own retail prices, but with a restriction. Distributors could set prices below a publisher's retail list price so long as they

A) matched the commission received from a publisher.
B) exceeded the commission received from a publisher.
C) did not exceed the commission received from a publisher.
D) did not increase prices to the readers.
E) prevented discounts to competitors.