The school Principal received several complaints from parents about bullying in the school campus during recess. He wants to investigate the matter and find the culprit. Therefore, he instructs to one of his teachers to look after the students during the recess. Which situation should the teacher report to the Principal?

• A. A lonely girl is sitting under the tree and crying.
• B. Four boys are forcefully trying to open another boy's backpack.
• C. Five girls are playing catch and throw game.
• D. Three boys are huddled ' over a mobile phone which is not supposed to be oh school campus.