Limit switches（）. A.control the descent ra
题型：单项选择题
问题：
Limit switches（）.
A.control the descent rate of a lifeboat
B.control the ascent rate of a lifeboat
C.cut off power to the winch when the lifeboat nears the final stowed position
D.cut off power to the winch when the lifeboat reaches the davit bumpers