Which of the following statements is true according to the passage?

A.Most women take walking as their only recreational activity.

B.Walking was the only recreational activity for about half of the women.

C.The study aims to track the health conditions of its subjects.

D.Irregular walking increased the risk of breast cancer in post-menopausal women

下述疾病所对应的沉着物中，有错误的是（）

A.Kayser-Fleischer环铜

B.Hudson-Stahli线铁

C.银沉着症银

D.褐黄病金

E.Krukenberg梭黑色素