Susan Is in High School and Washes Her Hands After

Susan is in high school and washes her hands after every class. Her hand washing involves a ritual in which she must wash and dry her hands twice, always with the third paper towel. Her friends are supporting her as she tries to deal with this disorder, while some students just consider her "weird". Susan's behavior would best fit which definition of abnormality?

A) biological
B) personally distressful
C) deviant
D) interactional