Select two correct answers. What are two methods for beginning the constitutional

Select two correct answers. What are two methods for beginning the constitutional amendment process?

A. An amendment is proposed by a vote of two-thirds of all registered voters in a general federal election.
B. An amendment is proposed by two-thirds of the states through a national constitutional convention.
C. An amendment is proposed by two-thirds of the state legislatures and state convention attendees.
D. An amendment is proposed by a vote of two-thirds of the members of both houses of Congress.