Twenty-Year-Old Brianna Lives in a Small Town

Twenty-year-old Brianna lives in a small town. She has always been extremely shy, but lately she has been feeling intensely afraid that others are scrutinizing her. She avoids speaking in class, she no longer goes to parties, and she no longer goes out to eat in restaurants. Brianna seems to be suffering from:

A) specific phobia.
B) social phobia.
C) generalized anxiety disorder.
D) panic disorder.