What is the first step when preparing to drive a car?

Answer: B — Adjust your mirrors and seat

The first step when preparing to drive a car is to adjust your mirrors and seat. This step is crucial because making sure that your seat is in the correct position allows you to reach all the controls comfortably and helps ensure proper posture while driving. Adjusting the mirrors gives you a clear view of the road and surrounding traffic, which is essential for safe driving. By performing these adjustments before starting the engine, you create a safe environment to operate the vehicle. Ensuring you're comfortable and have a good field of vision can significantly reduce the risk of accidents once you begin driving. Fastening your seatbelt, checking for traffic, and starting the engine are important actions that follow the adjustments but should be done after ensuring you are properly positioned and ready to drive.