Which Statement Is an Institutional Explanation for the Rise of Public

Which statement is an institutional explanation for the rise of public appeals by presidents?

A) Presidents are becoming more charismatic, which increases their likeability and the responsiveness of the public to their message.
B) Presidents are becoming more dependent on political elites, who always advise them to go public to advance the political message of the party.
C) The importance of political elites has declined, and thus presidents cannot remain isolated but must appeal to a diversity of interest groups and political actors.
D) Presidential power has grown so much that it now dominates the political world, making all other actors irrelevant.