Which of the Following Was NOT Suggested as a Reason

Which of the following was NOT suggested as a reason women are twice as likely as men to die following a heart attack?

A) Women with CVD tend to be older than their male counterparts.
B) CVD tends to be diagnosed sooner in men than in women.
C) Women are treated more aggressively than men are.
D) Until recently,women have been underrepresented in clinical studies of CVD.