Did Officer Knight Have the Right to Stop Jack for Questioning

Multiple Choice

Did Officer Knight have the right to stop Jack for questioning

A) Yes, Officer Knight is allowed to stop anyone who is behaving suspiciously and verify that what they are doing is legal.
B) Yes, the specific facts that Officer Knight observed would lead any reasonable officer to believe that Jack was about to start a fight.
C) No, Officer Knight does not have the right to stop Jack unless a crime has occurred.
D) No, Officer Knight did not have probable cause to arrest Jack at the time he yelled at Jack to step back and put his hands up.