Which of the following scenarios represents a way an amendment can become law?

A.
Two-thirds of state legislatures request a national convention to propose an amendment, which is ratified by two-thirds of the states.

B.
Three-fourths of state legislatures propose an amendment, which is ratified by three-fourths of the states.

C.
Two-thirds of state conventions propose an amendment, which is ratified by three-fourths of state legislatures.

D.
Two-thirds of Congress proposes an amendment, which is ratified by three-fourths of state legislatures.