Answer:
A) A conditioned response.
Explanation:
According to the classical conditioning theory, a condition response is obtained by pairing an unconditioned stimulus and conditioned stimulus. When the pairing of the unconditioned stimulus and conditioned stimulus is performed in close proximity it results in conditioned response. Dentist's drills is an unconditioned stimulus that results in Simon's cringe and later the sound of this drill become conditioned response, resulted in Simon's cringe even not in the presence of the dentist is the conditioned response.