The President's Leadership of Public Opinion ______

The President's leadership of public opinion ______.

A) depends on the public's appraisal of him as president, and appeals from unpopular presidents are likely to be ignored
B) is exceptionally strong because he can command so much public attention and has access to more information
C) is nonexistent because of the growth of cable television and social media making it easier for the public to ignore the President
D) is effective only on foreign policy issues where the public tends not to have well-formed attitudes