In astern towing, a tow span, also called the "tow bar" or "towing arch", is used to __________.

A
insure that the hawser leads directly aft as it passes over the stern of the towing vessel
B
increase the stability of the towing vessel by raising the hawser off the deck
C
reduce chafing of the towing hawser
D
prevent fouling of the hawser on deck gear located on the stern of the towing vessel
E