A 28- year- old woman seeks psychiatric consultation. She explains that 10 years ago, she had a panic attack while presenting her project at the high school science fair. Since then she has developed an intense fear of being embarrassed or humiliated in a public venue. She is constantly worried that others are scrutinizing her. She is very self- conscious and afraid that she will have heart palpitations, trembling, or stuttering or that her mind will go blank. She refuses to go on dates and is not being considered for a new job b/c she declined the interview. She is tired of living such an isolated life. What is the likely diagnosis?

A. Avoidant personality disorder.
B. Obsessive- compulsive disorder.
C. Panic disorder.
D. Social anxiety disorder (social phobia).