You Are Conducting an Informal Study in Which,for a Month,you

Multiple Choice

You are conducting an informal study in which,for a month,you play a particular song for your best friend right before you serve dinner to her.Eventually,you play the song,and then wait to see how your friend responds.She begins to salivate and says she has hunger pains.In this scenario,what is the unconditioned stimulus?

A) the song
B) the food
C) the time of day
D) salivation