What should you do if your vehicle breaks down on the highway?

Answer: B — Stay in the car and call for help

If your vehicle breaks down on the highway, it is crucial to stay in the car and call for help. This choice is correct because remaining inside your vehicle protects you from potential dangers, such as passing traffic. Highways can be busy and having a car that has broken down presents risks not only to the driver but also to other road users. Additionally, staying in your vehicle allows you to be in a secure space while you wait for assistance. If you find yourself stranded in the middle of the highway, it's safer to keep your seatbelt on and wait for roadside assistance or emergency services to arrive instead of risking your safety by exiting the vehicle. Using emergency lights and staying in a visible location increases the chances that help will arrive more quickly.