Despite Their Popularity Over the Past Few Decades, Presidential Media

Despite their popularity over the past few decades, presidential media strategies and public appeals regarding their policy programs have rarely been consistently effective, mainly because:

A) most Americans are well-informed enough about public policy presidential appeals convey no new information.
B) policies backed by the executive almost inevitably fall short of voter expectations, leading to declines in presidential approval ratings, even if they may bounce back later.
C) when presidents have high public support, they tend to be unwilling to spend their political capital on potentially controversial programs.
D) with the media's intense focus on presidents, it is inevitable that people will get tired of seeing them and hearing about them over time; familiarity breeds contempt.