【单选题】
A A.If hydraulic B fluid is lost the landing gear can be extended by automatic activation of the transfer unit
B B. In case of No1 engine failure/separation, the gear can be retracted after takeoff.
C C.In case of engine failure the gear can be retracted in order to reduce drag for the cruise segment.
D D.If hydraulic A fluid is lost, the transfer unit must be manually selected to B fluid when the gear lever is selected up.
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