Which of the Following Best Describes the Current State of Presidential

Which of the following best describes the current state of presidential nominating power?

A) Most of the power rests in the hands of party activists due to their ability to come out for early primaries and caucuses.
B) Most of the power rests in the hands of the party leadership and power brokers through the use of rule changes since the 1970s.
C) All power rests in the hands of the primary voting constituency, who effectively choose the nominee over the course of the primary season.
D) The media has enormous power in determining who the nominee will be based on coverage at debates.
E) The candidates themselves have the most power, through their negotiations during the conventions.