How does a driver pick the 'control speed' before going down any hill?
Answer: A — By selecting the proper gear for the grade of the road and the engine in the vehicle
A driver picks the 'control speed' before going down any hill by selecting the proper gear for the grade of the road and engine in the vehicle. This option is correct because it ensures the vehicle has enough power and control to safely navigate the hill. Option B, accelerating before the hill, may not give the driver enough time to properly assess the grade of the road and adjust the gear. Option C, turning off the engine, is unsafe and can lead to a loss of control. Option D, using the highest gear possible, may not provide enough power to control the vehicle on the hill.