Braden Presents at the Emergency Room Experiencing Intense Symptoms of Anxiety

Braden presents at the emergency room experiencing intense symptoms of anxiety that seem to come on suddenly and unexpectedly.When assessed by the psychologist,Braden cannot identify any object or event that triggers his anxiety,nor does he report feeling constantly on edge.In addition he has not been exposed to any life-threatening traumas.Braden most likely has which of the following disorders?

A) post-traumatic stress disorder
B) generalized anxiety disorder
C) panic disorder
D) specific phobia
E) bipolar disorder