What Does Your Text Cite as a Potential Factor for Why

What does your text cite as a potential factor for why breast cancer has a higher mortality rate in men than women?

A) Less is known about how to treat breast cancer in men.
B) Men focus more on testicular self-exams than breast self-exams.
C) It is often diagnosed later in men than in women.
D) Men are more likely to develop a more deadly strain of breast cancer.