Who Are the Three Main Players in an Iron Triangle

Who are the three main players in an iron triangle?

A) Congress,the president,and the courts
B) businesses,interest groups,and political action committees -Consider This: Members of iron triangles are characterized by mutual dependency in which all of the entities provide some benefit to the others.
C) politicians,candidates,and bureaucrats
D) bureaucratic agencies,interest groups,and congressional committees and subcommittees