Answer:
b. conditioned stimulus
Explanation:
A conditioned stimulus refers to an event that makes someone react to something because it has been related to something else. This means that the response is learned after something happens over time. In this case, you ate french fries and on the same day you got sick and threw up. Because of this, the french fries that were not related to this situation, became associated with the illness. As a consequence, you feel nauseous when you see french fries.
