Who Are the "Gang of 14

Who are the "gang of 14"?

A) a group of moderate Republican and Democratic senators that agreed to use the judicial filibuster only under extraordinary circumstances
B) the Chief Justice and the Associate Justices of the Supreme Court
C) those who have served as Chief Justice of the Supreme Court at one time or another
D) those who have been nominated to serve on the Supreme Court by the president but were not confirmed by the Senate
E) a group of Senators who evoked the nuclear option in judicial appointments.