A. "...'Take one psychology class and you know everything. You need to go on back to college...'"
Society is what best summarizes the role of conversation.
I can’t really see the picture
The purpose of an essay is determined by your goal as a writer, as well as your subject matter.
I would guess it would be the first one since rather than relying on just how she thinks it will be she actually goes out and tests it to be sure