The argument is the first line of the paragraph. “The rate of recorded heart attacks among women…soon start to fall because a new blood test…has been developed…provides a more accurate diagnosis…”. We must find a flaw in this statement.
Firstly, the text does not mention anything about heart attacks in men. So we can eliminate options B and E.
The flaw is that with more accurate diagnosis, the recorded rates of heart attacks in women is likely to increase rather than decrease. This is stated by A.
C – Wrong
The text does not suggest, in any way, that a blood test is the only way of diagnosing when a heart attack has taken place. There could be other methods as well.
D – Wrong
Nothing is mentioned about the effectiveness of the treatment given for heart attacks.