Final answer:
Maintaining an upright position is important for steering a vehicle effectively.
Step-by-step explanation:
Of the given options, the correct answer is c. maintain an upright position. When driving, maintaining an upright position allows for better control and stability. Failing to maintain an upright position can make it more difficult to steer the vehicle effectively. Use your core muscles to support your back and sit upright, with your hands on the steering wheel in the proper position.