question: Q:A 29-year-old male presents to the office with the complaints of a pounding heart, poor sleep, and a generalized feeling of restlessness. He relocated 2 months ago to take a promotion and has found himself unable to concentrate on his new duties. He worries about his ability to adapt to his increase in responsibility at work and states that he has called in sick 3 days within the past 2 weeks. The most likely diagnosis is? 
  A:adjustment disorder with anxious mood;B:generalized anxiety disorder;C:major depressive disorder, single episode, moderate;D:obsessive-compulsive personality disorder