In the illustration, the function generators will accept only a signal of a given polarity, if negative is used for ahead and positive for astern, moving the bridge reference in the direction indicated will _________. SE-0002 A. pass through the amplifier M to the astern function generator to open the astern steam valve B. pass through the amplifier M to the ahead function generator to open the ahead steam valve C. do nothing because engineroom control is selected D. not cause a speed change until the output voltage exceeds the value of the lube oil pressure override