When Thomas Was a Little Boy, His Mother Often Gave

Multiple Choice

 When Thomas was a little boy, his mother often gave him a piece of candy whenever she had to bandage up a scraped elbow or knee. Now that Thomas is in college, he struggles with his weight because every time he feels sad or lonely, he craves something sweet to eat. It is likely that for Thomas, eating candy now serves as a(n)

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