Imagine Standing in Line at a Store and Having a Stranger

Multiple Choice

Imagine standing in line at a store and having a stranger in front of you say, "Lately I have been thinking about how I really feel about myself. I think I am pretty well adjusted, but I occasionally have some questions about my sexual adequacy." This person has just illustrated

A) overdisclosure.
B) mutual exchange.
C) social comparison.
D) the actor-observer bias.