What should you do when you are approaching an intersection?

Answer: B — Stop and proceed when safe

It's important to come to a complete stop before entering an intersection to ensure the safety of yourself and others on the road. Option A is incorrect because simply slowing down may not give you enough time to stop if needed. Option C is incorrect because it assumes the presence of a traffic light, but not all intersections have traffic lights. Option D is incorrect because speeding up is dangerous and goes against safe driving practices. It's always best to err on the side of caution and come to a complete stop before entering an intersection, and then proceed when it is safe to do so.