Which of the following is not a suitable preparation when carrying a passenger?

Answer: C — Riding without a helmet

Carrying a passenger on a motorcycle requires particular attention to safety measures to ensure both riders remain protected. Wearing appropriate safety gear, which includes helmets, is essential as it significantly reduces the risk of severe head injuries in the event of an accident. Proper gear helps to provide the necessary protection to both the driver and the passenger. When considering the correct answer, riding without a helmet is an unsafe practice and is certainly not a suitable preparation. Helmets are a critical piece of safety equipment, and the law in many places, including Washington, mandates their use for both riders and passengers. The other options involve proper and safe practices when preparing to ride with a passenger. Ensuring safety gear is worn confirms that both individuals are protected. Having the engine started is a standard part of preparing the motorcycle for travel, allowing the operator to check that everything is functioning correctly. Keeping feet on the ground is important when the motorcycle is stationary, as it provides stability while the passenger is getting on or off, enhancing safety before the journey begins.