Sean, a Junior in College, Has Difficulty Making Decisions and When

Sean, a junior in college, has difficulty making decisions and when he finally makes a decision he worries about whether it was the right decision. He constantly worries about his courses, future, girlfriend, and getting a summer job. Recently Sean has had heart palpitations and muscular tension. Sean's symptoms are MOST consistent with

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