When a passenger wants to jump over the ticket gate , what should a station officer do?

A、A station officer should come up to stop him and check the situation out.;
B、If the passenger has not bought a ticket, a station office should ask him to buy a ticket and pay the extra penalty.;
C、If the passenger has bought a ticket, a station office should check if there is something wrong with his ticket. ;
D、A station office should yell for help and call the police directly.