The Police Are Called to a School to Address an Altercation

The police are called to a school to address an altercation between two boys.Jim has a broken arm after Tom slammed him into the wall of the school because Tom believed Jim had stolen his phone.It was a case of mistaken identity.What is the material circumstance component of actus reus in this event?

A) Jim has a broken arm
B) Jim was not the intended target
C) Tom slammed Jim into the wall
D) Jim did not consent to being pushed