单选题When anchoring a vessel under normal conditions，which scope of chain is recommended? （）AFour times the depth of waterBTwo and one-half times the depth of waterCFive to seven times the depth of waterDFifteen times the depth of water
单选题
When anchoring a vessel under normal conditions，which scope of chain is recommended? （）
A
Four times the depth of water
B
Two and one-half times the depth of water
C
Five to seven times the depth of water
D
Fifteen times the depth of water
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