A 22- year- old college student presents to a MH clinic for an initial visit. She has not turned in any of her papers on time this term b/c she worries about getting poor grades, and this worry has affected her ability to concentrate. She is also very concerned about getting a job after she graduates, despite multiple meetings with a career counselor. She says that she is concerned with the sanitation at the local gym and prefers to to play recreational sports b/c she might be injured. She does not have any rituals or checking behavior's. She describes her mood as "irritable" and says that she feels "tense all the time". Her appetite has not changed, and she continues to enjoy watching movies. She denies low energy and has not had any thoughts of harming herself. She tried cocaine last year but has not used any illicit substances or alcohol recently. What is the likely diagnosis?

A. Adjustment disorder.
B. Generalized anxiety disorder.
C. Major depressive disorder.
D. Obsessive- compulsive disorder.