Answer:
A. the spotlight effect.
Step-by-step explanation:
Cathy is most likely experiencing the spotlight effect. The spotlight effect is when we think that people will notice more things about us than what they really notice. This effect is the result of our egocentrism, and we are the center of our universe. We think that people would notice something we see as misplaced. But people are concerned with other things other than a T-shirt.