The Electoral College consists of 538 electors.
The Cabinet includes the Vice President and the heads of 15 executive departments
Today, Rules in the U.S. House of Representatives generally limit each full committee to five subcommittees
The Supreme Court, though, always counts with 9 justices and it seems to be, because of that, and other things, the only one to fit the graphic.
The correct answer is:
The Supreme Court
