单选题The operating cord on an inflatable liferaft should be renewed by（）.Aremoving the top half of the shell，cutting the line at its source，and renewing completelyBcutting the line where it enters the case and replacing that portionCleaving the original line and tying another one to it so the two lines will take the strainDan approved servicing facility ashore
单选题
The operating cord on an inflatable liferaft should be renewed by（）.
A
removing the top half of the shell，cutting the line at its source，and renewing completely
B
cutting the line where it enters the case and replacing that portion
C
leaving the original line and tying another one to it so the two lines will take the strain
D
an approved servicing facility ashore
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