题目：THE (EGPWS) 揟ERRAIN, TERRAIN?AURAL ALERT IS HEARD WHEN THE AIRCRAFT IS:
A、In mode 2A, with landing flaps down or the aircraft in the Glide Slope (G/S) beam.
B、In mode 2B, with landing flaps down or the aircraft in the G/S beam.
C、In mode 2A, with landing flaps not down and the aircraft not in the G/S beam.