Which One of the Following Is an Example of Negative

Which one of the following is an example of negative reinforcement?

A) A teacher praises Kevin profusely, to the point that it embarrasses him, when he turns in his homework.
B) When Katie insults another student while waiting in line for lunch, her teacher moves her to the end of the line.
C) When Elijah complains about a classmate who is picking on him, his teacher allows him to come in from recess on bitterly cold days.
D) When Priscilla answers a teacher's question incorrectly, Mike teases her unmercifully.