The Main Way to Tell Someone Is Having an Uncued

The main way to tell someone is having an uncued panic attack rather than is in a state of fear is

A) whether he or she thinks about what is happening.
B) whether he or she shows physiological changes such as increased heart rate.
C) if he or she has a subjective belief that something awful is about to happen.
D) if he or she feels a strong urge to flee.