Which of the Following Is NOT a Reason Why Presidents

Which of the following is NOT a reason why presidents are less frequently using the tool of going public?

A) Public opinion is notoriously fickle,and declines in popular approval are inevitable.
B) Presidents are increasingly relying on institutionalized public and media relations efforts to craft a favorable public image to promote specific policies.
C) Congress has increasingly delegated its powers to the executive branch,which has reduced the need for presidents to rely on public opinion to advance their policy goals.
D) Technological change has fragmented the public,leading to declining viewership and readership of mainstream media outlets.
E) Shrinking and fragmented audiences have raised the costs of going public,casting doubt on the effectiveness of presidential efforts to mobilize public opinion