A referendum refers to an electoral process in which

A) party leaders choose the nominees of a political party.
B) citizens may attempt to remove incumbent public officials before the completion of their terms.
C) a law or constitutional amendment proposed by a legislature or city council must be approved by the majority of voters before going into effect.
D) party members, instead of party leaders, choose nominees of a political party.
E) a proposed law or amendment is placed on the ballot by citizen petition.

C