You may pass a vehicle when:

1. You are on a hill or curve.
2. You are on a road with a solid line next to your lane.
3. You are on a road with a broken line next to your lane. ✓

Answer: C. You are on a road with a broken line next to your lane.

You may pass a vehicle when there is a broken line next to your lane.

Why this is the answer

The handbook ties passing to the painted line beside your lane. It says a broken yellow line means you may pass when that broken line is next to your driving lane, and it adds that you should pass only when it is safe. By contrast, it tells you not to pass when a solid yellow line is on your side or when double solid yellow lines are present. So the broken line beside your lane is the situation that permits passing.

Why the other answers are wrong

• A. You are on a hill or curve. — A hill or curve is not a lane marking that gives you permission to pass; the handbook's passing rule depends on the line next to your lane.
• B. You are on a road with a solid line next to your lane. — A solid line next to your lane does not open passing; the handbook says not to pass with a solid yellow line on your side.

Remember it

Broken line beside you means passing is allowed when safe; solid line beside you means no passing.