You Clap with Delight When Your Young Son Picks Up

You clap with delight when your young son picks up a spoon.You laugh and applaud when he later brings the spoon toward his mouth.When he places the spoon in his mouth you hug and kiss him all over.It is MOST likely that you _____.

A) are using a fixed interval schedule
B) are using a fixed ratio schedule
C) are using classical conditioning
D) are using shaping to teach your son to eat with spoon