Which of the Following Are Necessary Condition(s) for Successful Price

Which of the following are necessary condition(s) for successful price discrimination? a. zero transaction cost
B. a perfectly competitive market structure
C. an imperfectly competitive market structure
D. at least two different markets with different price elasticities of demand
E. at least two different markets with different price elasticities of supply

A) a, b, and d only
B) c and d only
C) a, c, d and, e only
D) a and c only