What should you do if you approach a stop sign at an intersection where there is no marked crosswalk or stop line?

Answer: C — Stop at a point where you have a clear view of approaching traffic.

When approaching a stop sign without a marked crosswalk or stop line, it is important to stop at a point where you have a clear view of approaching traffic. This ensures that you have enough time to check for oncoming vehicles or pedestrians before proceeding through the intersection. Option A is incorrect because it suggests stopping before entering the intersection, which may not provide enough visibility for approaching traffic. Option B is incorrect because it suggests stopping directly at the stop sign, which may not give you enough time to check for oncoming traffic. Option D is incorrect because it suggests only slowing down and proceeding with caution, but it is still important to come to a complete stop to ensure the safety of other drivers and pedestrians.