You are approaching another vessel and see that she has the signal flag "J" hoisted. What should you do?

A、Keepwellclearofthevesselbecausesheisonfireandhasdangerouscargoonboardorsheisleakingdangerouscargo
B、AttempttocallthevesselonVHFradiotelephonebecausesheisrequestingtocommunicate
C、Approachthevesselwithcautionbecau