【单选题】
A A.No further action is necessary in flight if the equipment cooling OFF light does not extinguish.
B B.Diversion is necessary in flight if the equipment cooling OFF light does not extinguish.
C C.Descending below FL250 is necessary in flight if the equipment cooling OFF light does not extinguish.
D D.Descending below FL200 is necessary in flight if the equipment cooling OFF light does not extinguish.
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