When a passenger’s ticker is stuck in the gate, what should a station officer do?

A、Astationofficershouldcomeuptoandcheckthegatemachine.;
B、Astationofficershouldcallthemaintenancestaffforhelpifhecannotopenthegatemachine.;
C、Astationofficershouldopentheaccessdoorandletthepassengergetout.;
D、Astationofficershouldaskthepassengertobuyanotherticketrightaway.