Why is walking a better exercise to fight against loneliness？A．It takes more time than dri

Why is walking a better exercise to fight against loneliness？

A．It takes more time than driving a car.

B．It doesn"t cost as much as driving a car.

C．It doesn"t pollute the air like the car does.

D．It makes one explore the area better than a car.

请帮忙给出正确答案和分析，谢谢！