The FMC Alerting Message 'SELECT MODE AFTER RTA' means:
A.A.RTA mode has been discontinued due to sequencing of the RTA waypoint
B.B.The RTA time does not fall within the earliest and latest takeoff time
C.C.RTA mode has been discontinued because the RTA waypoint has been removed from the Flight Plan
D.D.Both first & third are correct.
正确答案是D