Client medical record Exhibits The nurse realizes that the client's greatest risk factor for breast cancer is which of the following?

A. Smoking history of light, past smoking is a less significant risk factor for breast cancer. B. Family history of breast cysts is not as strong a risk factor as a family history of breast cancer. C. Moderate intake of fat in diet is not a major risk factor here. D. Early menarche (age 10) increases lifetime exposure to estrogen, which is a significant risk factor for breast cancer.