You are on a single-screw vessel with a right-handed propeller, and you are making headway. When you enter shallow water, __________.

Correct Answer: Option C — your rudder response will become sluggish

Shallow water creates a 'cushion' effect and restricts water flow around the hull. This increased resistance and the interaction between the hull and the seabed cause the vessel to become sluggish in response to rudder commands. The propeller wash is also disrupted, further reducing the effectiveness of the rudder.