Tad Was Driving in His Car the Other Day and Started

Tad was driving in his car the other day and started to feel his heart begin to race. Within a minute or two, he began sweating, shaking, and felt like something terrible was going to happen. Because this experience was so intense, Tad pulled off the road until he began to feel better. Within about fifteen to twenty minutes, he returned back to his normal self. While the episode only happened in his car on a few different occasions, he has gotten to the point where he refuses to drive when he goes out, for fear that another episode will occur. Tad seems to have symptoms of _____

A) conversion disorder.
B) panic disorder with agoraphobia.
C) a specific phobia.
D) panic disorder without agoraphobia.