Landing autobrake settings may be selected after touchdown:
A.A.However, the AUTO BRAKE DISARM light will illuminate and autobrake application will not occur
B.B.However, autobrake action will occur only when both thrust levers are retarded to reverse thrust range
C.C.Prior to decelerating through through 60 knots groundspeed
D.D.After decelerating through 60 knots groundspeed
正确答案是C