A、The national health. B、Heart attacks. C、The cause of stress. D、Health care for women. B对话中谈到了录像的主题，“It was about stress，the e

M: What did you think about the video we were supposed to watch for Professor Stephen’ s class?
W: I didn’t see it. Was it good?
M: Really it was. It was about stress, the effects of stress on the national health.
W: It was interesting, right?
M: Yes. I think they said that one out of nine women aged 45 to 65 will have a heart attack.
W: I’ m surprised at that.
M: I was too. Oh, another thing. They said that women usually don’ t get the same level of care as men do, so the heart attack is likely to be more serious.
W: Why is that?
M: Because many members of the medical profession still think of a heart attack as a male problem, so they don’ t recognize the symptoms in women patients.
W: Well, it does sound very interesting. I’ m going to try to see it before class next time, so I’ll be ready for the discussion.