Faith has been diagnosed with alcohol use disorder. As such, she has been prescribed disulfiram, which is considered a:_________ When an individual taking disulfiram consumes alcohol, they experience unpleasant reactions such as nausea, vomiting, and headaches, which helps to deter them from drinking. This is a part of ___ therapy.

a. Agonist; aversion
b. Emetic; cognitive
c. Antagonist; aversion
d. Chemical; contingency