【单选题】
A A.Is controlled by both the Engine Fire Warning switch and the Engine Start lever; however, the spar fuel shutoff valve is controlled only by the Engine Start lever.
B B.Is the only fuel shutoff with an associated blue light on the forward overhead fuel panel
C C.And the spar fuel shutoff valve require AC power to operate
D D.And the spar fuel shutoff valves close whenever their respective Engine Fire Warning switch is pulled or Engine Start lever is placed to CUTOFF
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