A Baby Will Not Stop Crying,and He Is Driving His

Multiple Choice

A baby will not stop crying,and he is driving his parents crazy.As a last resort,the father puts the baby in a laundry basket and sets the basket on top of the running dryer.The vibrations of the dryer soothe the baby and he falls asleep.The father congratulates himself on discovering this solution,which he most definitely will employ the next time the baby cannot be consoled.The father's behaviour of implementing the "dryer trick" has thus been:

A) positively reinforced.
B) negatively reinforced.
C) positively punished.
D) negatively punished.