When cleared for an IFR approach to an uncontrolled airport with no FSS, what precaution should the pilot take after being advised to change to advisory frequency?
A.Monitor ATC for traffic advisories as well as UNICOM.
B.Broadcast position and intentions on the Common Traffic Advisory Frequency and monitor the frequency.
C.Wait until visual contact is made with the airport and then broadcast position and intentions to land on UNICOM.
正确答案是B