John Buff Picks a Fight with James Smalls

John Buff picks a fight with James Smalls. John begins to punch James in the face over and over again for no reason at all. James tries to fight back and in doing so he knocks John down on the ground where John hits his head on a rock and dies. James is arrested and charged with the murder of John. ​

A) James, a minor, panics because he realizes he has killed John, and picks up a knife when the police show up. The police have:
B) the authority to discipline children, so can use any amount of force necessary.
C) the authority to discipline children, so can use any amount of force except for deadly force.
D) no authority to discipline children, and so may not use force against James.
E) no authority to discipline children, but may use reasonable force to prevent injury to other persons or themselves.