An agent that causes the pupil to dilate is called:

A) miotic.
B) beta blocker.
C) cholinergic.
D) mydriatic.

Mydriatic

Pertaining to or causing dilation of the pupils; often used in eye examinations or surgeries.

Miotic

Pertaining to substances or medications that cause the pupil of the eye to constrict.

Cholinergic

Pertaining to cells or substances that release or are activated by acetylcholine, a neurotransmitter.