While Helping Presidents Compete Successfully with Opposition-Controlled Congresses, the Development

While helping presidents compete successfully with opposition-controlled Congresses, the development of cable television and other mass communications technology has also done which of the following?

A) eroded the President's capacity to enlist television to go public.
B) made going public more effective for presidents.
C) caused opposition parties to be less likely to win control of Congress.
D) made the Supreme Court a much more important institution regarding public policy.