When is it legal to pass another vehicle?
Answer: A — When the lane you are in has two or more lanes
It is legal to pass another vehicle when the lane you are in has two or more lanes because in this situation, there is an extra lane specifically designed for passing other vehicles. Passing in a single lane road is dangerous and could result in a collision. Option B is incorrect because driving slow does not necessarily warrant passing. Option C is also incorrect because the broken center line indicates that passing is not allowed in either direction. Option D is incorrect because relying on another driver's decision can be risky, and it is ultimately up to the passing driver to ensure a safe pass.