A “spring line” is（）.<br>A:any wire rope used for mooring<br>B:a fire-warp<br>C:a mooring line running diagonally to the keel<br>D:a mooring line perpendicular to the keel

A “spring line” is（）.
A:any wire rope used for mooring
B:a fire-warp
C:a mooring line running diagonally to the keel
D:a mooring line perpendicular to the keel

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