Which of the following are the early warning functions of GPWS
A.正确答案DTerrain awareness and display;Runway convergence criteria;Unsafe lift off when not in landing configuration
B.Altitude drop after take-off, unsafe terrain clearance when not in landing configuration, Runway Field Clearance Floor (RFCF)
C.Terrain awareness and display;Runway convergence criteria; Runway Field Clearance Floor (RFCF) ;descent below glide slope
D.Terrain awareness and display;Runway convergence criteria;Runway Field Clearance Floor (RFCF)