The Main Difference Between Situational Phobia and Panic Disorder (PD)

The main difference between situational phobia and panic disorder (PD) is that

A) people with situational phobia never experience panic attacks outside the context of the phobic situation.
B) people with situational phobia experience panic attacks when confronted with the phobic situation as well as at other times.
C) people with PD experience panic attacks only in specific situations.
D) people with PD experience panic attacks only at specific times.