Antonym of FORBID

Answer: Option D

Forbid : refuse to allow (something).
Provoke : stimulate or give rise to (a reaction or emotion, typically a strong or unwelcome one) in someone.
Appreciate : recognize the full worth of.
Celebrate : acknowledge (a significant or happy day or event) with a social gathering or enjoyable activity.
Permit : officially allow (someone) to do something.

Antonym of Forbid is Permit