单选题The purpose for the bag or box on top of some survival craft is to（）.Aright the craft in case of capsizingBincrease area for radar detectionCact as a sail in case of a power lossDsteady the craft in heavy seas
单选题
The purpose for the bag or box on top of some survival craft is to（）.
A
right the craft in case of capsizing
B
increase area for radar detection
C
act as a sail in case of a power loss
D
steady the craft in heavy seas
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