Insulin Is Produced by the Body When Sugar Is Ingested

Multiple Choice

Insulin is produced by the body when sugar is ingested. Research has found that insulin starts being produced just when sugar is put on the tongue-before it actually gets into the stomach and, ultimately, the bloodstream. In this scenario, sugar just touching the tongue would be a(n) :

A) conditioned stimulus.
B) conditioned response.
C) unconditioned stimulus.
D) unconditioned response.