What is the best method for a GMDSS Radio Operator to determine which SITOR station to contact for the purpose of sending a chargeable message or cable?

Correct Answer: Option B — Listen to each station's "free signals" and call the station generating the loudest marker.

Under USCG National Maritime Center examination standards, the accepted correct answer is: Listen to each station's "free signals" and call the station generating the loudest marker..