choice C is confusing. it can be construed as a light beam pointing in the direction being proceeded by the tow and not in the direction of illuminating the tow. direction of the tow, here, means at the tow.
Deck
Rules of the Road: INLAND ONLY Which indicates the presence of a partly submerged object being towe...
Discussing this exam question.
Rule 24 (g) etc
"The Tow" is what is being towed.