The Text Suggests That ___________ May Be One Important Reason

The text suggests that ___________ may be one important reason personal persuasion is frequently not ​effective in advancing the president's agenda.

A) ​the opposition party may be focused on making the president look bad, rather than working to accomplish legislative goals,
B) the fact that ​presidents generally don't have adequate political skills
C) ​historical mistrust of the president's character
D) ​constitutional separation of powers preventing the president from making adequate appeals to the Congress
E) ​most issues are not amenable to resolution by compromise