Caffeine Is an Antagonist and Therefore It Is an Example

Multiple Choice

Caffeine is an antagonist and therefore it is an example of a drug that:

A) inhibits the action of a neurotransmitter.
B) mimics the action of a neurotransmitter by binding with and stimulating postsynaptic receptor sites.
C) increases the action of a neurotransmitter.
D) makes it more difficult for neurotransmitters to be deactivated.