What must you do when parked at the side of the road at night?

Answer: B — Turn on your 4-way emergency flashers

When parked at the side of the road at night, it is essential to turn on your 4-way emergency flashers. This action alerts other drivers to your vehicle's presence, especially in low visibility conditions that occur at night. The use of emergency flashers enhances safety by making your vehicle more noticeable and helping to prevent accidents, as other drivers may not expect to see a stationary vehicle on the roadside. While it is important to keep your headlights functional, the primary purpose of emergency flashers is to signal to other drivers that your vehicle is not in motion and may require caution. Staying inside your vehicle is not a requirement and can depend on the situation, and although parking close to the curb is a good practice, the activating of emergency flashers is a more critical safety measure in nighttime scenarios.