A condition where two currents meet at the downstream end of a middle bar can be determined by a __________.

Correct Answer: Option B — V-shaped ripple with the point of the V pointing downstream

A V-shaped ripple pointing downstream indicates the convergence of two currents, often found at the tail of a middle bar. This visual indicator warns the mariner of turbulent water and potential shoaling, requiring careful navigation to avoid being pushed off course by the meeting of the two flows.