A woman who has not attended school in 13 years enrolls for classes at the local community college. She is afraid that her younger classmates might not accept her. On the first day of class, she observes the clothing styles of her classmates, and after school she goes shopping and purchases similar clothes. Her classmates could be considered .
A. a reference group
B. an in-group
C. a focus group
D. both a reference group and an in-group