Walking is that the most exciting form of exercise a person can take on for fitness. Yeah it is low impact and requires no fancy equipment. That makes walking a simple activity for those new to exercise. Walking is less likely than other exercises to cause injury to leg tendons and muscles. All it requires is a good pair of sneakers-no cables, stylish outfits, or weights required. Of course, a person could increase the benefit of a work out by adding weights or speedwalking. Which of the following statements supports the main idea in this paragraph?

A: walking is boring
B: walking requires sneakers in good condition
C: walking has a low risk of injury
D: walking is too easy for those who exercise regularly