Mr Roberts Had to Step Out of the Class for a Moment

Mr. Roberts had to step out of the class for a moment and tells Megan to watch the class. Megan begins to get teased by her classmates for being a goody-goody and the teacher's pet. When Mr. Roberts returns, Megan tells him that she does not ever want to be left in charge of the class again. In this situation, Megan was

A) positively reinforced by her classmates.
B) negatively reinforced by her classmates.
C) punished by her classmates.
D) punished by the teacher.