Final answer:
Driving a vehicle requires a combination of both mental and physical effort, with a ratio of about 90% mental and 10% physical.
Step-by-step explanation:
The mental and physical effort required to drive a vehicle can vary depending on various factors such as traffic conditions, driving skills, and the type of vehicle. However, in general, driving a vehicle requires a combination of both mental and physical effort. The ratio of mental and physical effort to drive a vehicle can be subjective as it may vary from person to person. However, it can be said that driving typically involves a significant amount of mental effort, such as attention, concentration, decision making, and situational awareness. At the same time, it also requires physical effort, like using the steering wheel, pedals, and maintaining proper posture. Therefore, option C) 90% mental; 10% physical, seems to be a reasonable estimation for the ratio of mental and physical effort involved in driving a vehicle.