People Who Have Panic Disorder Have Panic Attacks

People who have panic disorder have panic attacks. At least one of these attacks must be followed by

A) a week of concern about having another attack.
B) demonstrable delusions about what the panic attack might mean.
C) a month or more of concern about having another attack, worry about what the attack might mean, or change in behavior.
D) 2 to 3 months of concern, worry, and behavioral change.