Select the diagnosis that best describes his or her symptoms. Harry is a 49 year-old bank manager. He has had a lot of uncertainty about his job recently, and many of his coworkers have been laid off. For the past two weeks, he has been extremely sad and hasn't been able to go to work at all. He has used up all of his sick days, and spends his time sleeping or sitting on his couch watching television. He can't concentrate on anything very long, and he has a lot of trouble deciding what he should do about his situation.