单选题As the designated rudder angle is being achieved, as a result of the original command input, the steering gear follow-up mechanism is（）Ain motion, providing a null inputBnot in motion, thus providing a null inputCin motion, providing an input to place the main pump on maximum strokeDin motion, providing an input to place the main pump at null stroke
单选题
As the designated rudder angle is being achieved, as a result of the original command input, the steering gear follow-up mechanism is（）
A
in motion, providing a null input
B
not in motion, thus providing a null input
C
in motion, providing an input to place the main pump on maximum stroke
D
in motion, providing an input to place the main pump at null stroke
参考解析
解析：
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