Answer:
He will find the scent and taste of tequila aversive
Explanation:
In classical condition when a neutral stimulus is combined with a unconditioned stimulus then the response which it generates is called the conditioned response.
Here, Robert drank too much tequila last night which made him vomit in the morning. The neutral stimulus was the tequila, the unconditioned stimulus was vomiting. Hence, when these two are paired then the scent and taste of tequila will be the conditioned stimulus which will cause the conditioned response of feeling sick.
Hence, he will find the scent and taste of tequila aversive