B. Join in on beating and picking on them, Payback is a b**** with a sweet side of revenge
C. Call the cops and try to help them/Walk off remembering all the pained they caused you.
D. Call the cops for them but leave quickly, you don't want to be the next victim
A. Go over to help and protect them, sure they are mean but hey your not that person to let someone get her no matter what they do to you.