Roger Is Tense and Anxious Almost Every Day

Roger is tense and anxious almost every day. Though he is frequently worried and often has the sense that something bad is about to happen, he can't relate his anxiety to any particular situation or setting. He has difficulty getting restful sleep at night and often takes antacids for his upset stomach. Roger would most likely be diagnosed as having:

A) generalized anxiety disorder.
B) obsessive-compulsive disorder.
C) panic disorder.
D) posttraumatic stress disorder.