The correct answer is B) V-shaped ripple with the point of the V pointing downstream. This is the correct answer because when two currents meet at the downstream end of a middle bar, it creates a V-shaped ripple pattern on the water's surface, with the point of the V pointing downstream. This is due to the convergence and interaction of the two currents, which creates this distinctive wave pattern. The other options are incorrect because a small whirlpool (A) would not be the expected observation, a V-shaped ripple with the point upstream (C) would indicate a different flow pattern, and a smooth patch of water (D) would not be the typical observation in this scenario.