自动驾驶仪和偏航阻尼器应该在什么时候关闭？

A. 300m
B. 200m
C. 100m
D. 150m

A. 天牛
B. 金龟子
C. 蛾
D. 蝇

A. final topping off is occurring
B. first starting to receive fuel
C. hoses are being blown down
D. hoses are disconnected and being capped