Which of the following is the part of the ratification process in the U.S. Constitution that has never been used? (1

O three-fourths of state legislatures ratify an amendment
• three-fourths of state conventions ratify an amendment
O Congress calls for a national constitutional convention
O Congress votes by two-thirds majority vote to propose an amendment

three-fourths of state conventions ratify an amendment

The part of the ratification process in the U.S. Constitution that has never been used is "Congress calls for a national constitutional convention."

The part of the ratification process in the U.S. Constitution that has never been used is the option where "Congress calls for a national constitutional convention."