A V-shaped ripple with the point of the V pointing upstream in a river may indicate a __________.

Correct Answer: Option C — towed-under buoy

A V-shaped ripple pointing upstream indicates an obstruction, such as a towed-under buoy, just below the surface. The water is forced to flow around the submerged object, creating a wake that propagates downstream. Recognizing these visual cues is essential for safe navigation in river environments and restricted waterways.