PT 64 S3 Q21

Economics professor: Marty’s Pizza and Checkers Pizzaare the two major ... ...

Which one of the following, if assumed, enables the economics professor’s conclusion to be properly drawn?
(A) Any company that refuses to accept coupons issued by a competitor when doing so would satisfy some of the company’s potential customers is motivated solely by the desire to hurt that competitor.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2011 LSAT (PT 64): Logical Reasoning B