What Rules Govern the Use of the Referendum at the Federal

Multiple Choice

What rules govern the use of the referendum at the federal level?

A) They can only be used to propose constitutional amendments.
B) They require a two-thirds vote of all Americans.
C) They require a two-thirds vote of Congress.
D) They can only be used for a declaration of war.
E) No provisions exist for the use of referenda at the federal level.