You may legally block an intersection:

1. If you entered the intersection on the green light.
2. During rush hour traffic.
3. Under no circumstances. ✓

Answer: C. Under no circumstances.

You may never legally block an intersection, so the correct choice is: under no circumstances.

Why this is the answer

The handbook's rule for entering traffic tells you that even with a green light, you should not start across an intersection when pedestrians or vehicles are blocking your pathway. In other words, a green light is not permission to pull in and sit there. The handbook gives no situation where stopping in the middle of an intersection is allowed, so there is no condition under which blocking one is legal.

Why the other answers are wrong

• A. If you entered the intersection on the green light. — A green light does not excuse it, because the handbook says that even with a green light you should not start across the intersection when pedestrians or vehicles are already blocking your path.
• B. During rush hour traffic. — The handbook passages say nothing that makes heavy traffic an exception, and the rule against pulling into a blocked intersection applies regardless of how busy the road is.

Remember it

Before you roll into an intersection, ask yourself whether there is room for your whole car on the far side. If there isn't, wait behind the line.