Mooring（）are placed on both banks of the Suez Canal about 200m apart.

A.a line is weakened by constantly pulling on it in one direction
B.normal wear on the line is thus distributed to different areas
C.it prevents the line from kinking or unlaying
D.it prevents permanent misalignment of the line's internal strands

A.managanese bronze
B.cast iron
C.mild steel
D.improved plow steel