Constitutional Amendment Elections Tend to Have Low Voter Turnout Because

Constitutional amendment elections tend to have low voter turnout because

A) they are held in "off" years, when there are no candidates on the ballot.
B) most of the amendments tend to be controversial and alienate voters.
C) there are additional qualifications that must be met in order to be eligible to vote in a constitutional amendment election, and most voters do not qualify.
D) most voters get confused by the complicated wording in the amendments.