The process by which the Constitution was approved by the states is known as

A. vetoing.

B. impeachment.

C. levying.

D. ratification.

Your answer is d. Ratification.

Vetoing is when the president/governor rejects signing a bill to make it a law.

Levying is when congress passes a bill the president signs it, in regards to taxes.

Impeachment is when congress finds charges against the president to remove him from office.