单选题In towing，chocks are used to（）.Aprotect the towline from chafingBsecure the end of the towline on the tugCstop off the towline while retrieving itDabsorb shock loading on the towline
单选题
In towing，chocks are used to（）.
A
protect the towline from chafing
B
secure the end of the towline on the tug
C
stop off the towline while retrieving it
D
absorb shock loading on the towline
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