If you are unsure of another vessel's intentions, what should you do?

Answer: C — Take evasive action to avoid collision

When faced with uncertainty about another vessel's intentions, taking evasive action to avoid collision is the prudent approach. This action aligns with the fundamental principles of the Rules of the Road, which emphasize the importance of avoiding collisions by taking proactive measures. If you cannot determine the course or behavior of another vessel, it is safer to maneuver your vessel in a way that reduces the risk of an incident. Assuming the other vessel will maintain its course could lead to a dangerous situation, particularly if the other vessel's intentions are different. Increasing speed to pass quickly may only escalate the situation or create new hazards. Simply signaling for clarification could result in a misunderstanding or delay in response, which could lead to an accident. Taking evasive action ensures that you are actively working to maintain safety and prevent accidents, demonstrating good seamanship and adherence to maritime rules.