问题
单项选择题
Which client has the highest risk of ovarian cancer
A. 30-year-old woman taking oral contraceptive pills.
B. 45-year-old woman who has never been pregnant.
C. 40-year-old woman with three children.
D. 36-year-old woman who had her first child at age 22.
答案
参考答案：B
解析：The incidence of ovarian cancer increases in women who have never been pregnant, are infertile, or have menstrual irregularities and after menopause. Other risk factors include a personal or family history of ovarian, breast, bowel, or endometrial cancer. The risk of ovarian cancer is reduced in women who have taken oral contraceptives, have had multiple births, or have had a first child at a young age.