【单选题】
A A.Loss of system A, flaps extended more than 1 and airborne
B B.Loss of system A or B, flaps extended more than 1 and airborne or wheel speed greater than 60 kts
C C.Loss of system A or B, flaps extended more than 1 and airborne or wheel speed greater than 20 kts
D D.Loss of system A or B, flaps extended and airborne or wheel speed greater than 60 kts and FLT CONTROL switch A or B Hydraulic System ON
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