Which of the following words is closest in meaning to “Ratify”?

Ratify means to approve formally.

• Correct answer - approve: it has the same meaning as Ratify.
• negotiate: to discuss in order to reach agreement - wrong, it does not mean the same as Ratify.
• challenge: to dispute or test - wrong, it does not mean the same as Ratify.
• denounce: to condemn publicly - wrong, it does not mean the same as Ratify.