What should be the following distance behind another vehicle?

Answer: C — At least 3 seconds

Maintaining a following distance of at least 3 seconds behind another vehicle is crucial for ensuring safety on the road. This distance allows enough time to react to the vehicle in front of you in case it suddenly stops or slows down. The 3-second rule is a general guideline that accounts for various factors that can affect stopping distance, such as vehicle speed, road conditions, and weather. By adhering to this standard, drivers can create a safer driving environment for themselves and others. It provides ample time to make quick decisions, reduces the chances of rear-end collisions, and allows for adequate space to maneuver if necessary. Although some drivers may feel more comfortable with a shorter following distance, especially in light traffic conditions, the 3-second rule is emphasized to accommodate different driving scenarios and ensure that drivers are prepared for unexpected situations that may arise.