Which of the Following Statements About Breast Cancer in Men

Which of the following statements about breast cancer in men is true?

A) The tumor is most commonly ER-positive.
B) The disease should be treated with cisplatin-based chemotherapy.
C) The majority of patients who undergo genetic screening will be found to have a BRCA1 germline mutation.
D) Approximately 25% of patients will have noninvasive disease at diagnosis.