If a streetcar is behind a vehicle waiting to turn left, what should the driver do?

Answer: B — Move to the next block for a proper turn

When a streetcar is behind a vehicle waiting to turn left, it is essential for the driver to consider the flow of traffic and the safety of all road users. Moving to the next block for a proper turn is the correct action because it prevents blocking the streetcar, which has a right of way and may be unable to easily maneuver around the waiting vehicle. This approach not only keeps the traffic moving smoothly, particularly in areas where streetcars operate frequently, but also ensures compliance with traffic laws that prioritize public transport. Additionally, it helps avoid any potential hazards that might arise from making a turn while being closely followed by a streetcar, thus contributing to a safer driving environment for everyone involved. Other options may involve unnecessary risks or delays that can complicate the traffic situation further.