Which mooring line is likely to undergo the most strain when docking a ship under normal conditions?（）

A.Dacron
B.Nylon
C.Esterlene
D.Polypropylene

A.Crossing the spring lines
B.Slacking all forward running lines while keeping all after running lines taut
C.Doubling up on spring or breast lines
D.Slacking bow and stern lines

A.Feeling the surface of the line for broken fibers
B.Measuring the reduction in circumference of the line
C.Observing for the appearance of mildew on the outer surface
D.Opening the strands and examining the inner fibers