If you're a fitness walker, there is no need to go to a gym. Your neighborhood can be your gym. You don't need a lot of fancy equipment to get a good workout either. All you need is a well-designed pair of athletic shoes. This paragraph best supports the claim that

A. fitness walking is a better form of exercise than weight lifting.

B. poorly designed athletic shoes can causc major foot injuries.

C. walking outdoors provides a better workout than walking indoors.

D. fitness walking is a convenient and valuable form of exercise.​