Fred Is Afraid of Spiders

Multiple Choice

Fred is afraid of spiders.He won't even watch a nature show on TV about them.When he sees a picture of a spider,he has a panic attack,but when he avoids looking at the image,his panic goes away.Fred's avoidance of spiders is being:

A) extinguished because he feels anxious after doing so.
B) positively reinforced through the neutral stimulus of avoidance.
C) positively reinforced because he is rewarded by his anxiety going down.
D) negatively reinforced because he is rewarded by his anxiety going down.