单选题

DURING OPERATION OF THE CARGO DOORS:

AThe manual selector valve sends a signal to the LGCIU to energize the blue hydraulic pump which pressurizes the door actuators.

BThe manual selector valve energizes the electro-selector valve which pressurizes the door actuators via the hand pump.

CThe manual selector valve sends a signal to the LGCIU to energize the yellow hydraulic pump which pressurizes the door actuators.

略

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