Which of the Following Factors Does NOT Limit the Effectiveness

Which of the following factors does NOT limit the effectiveness of public appeals?

A) Popular support can be fickle and fade quickly.
B) Programs advocated by the president almost inevitably fall short of popular expectations,leading to a decline in public support.
C) When presidents have high public support,they tend to be unwilling to spend their "political capital" on potentially controversial programs.
D) Declines in popular approval during a president's term are nearly inevitable.
E) Presidents do not always keep campaign promises,resulting in lower public support.