E. THE SECOND SENTENCE SAYS THAT PCOS IS “LITTLE UNDERSTOOD” AND “...

23. e. The second sentence says that PCOS is “little understood” and “often goes undetected and is fre-quently misdiagnosed.” Thus, many women who have the syndrome do not even know they have it.One symptom of PCOS is infertility, but not all women who have PCOS are infertile, so choice aisincorrect. The passage tells us that new research has debunked the theory that male hormones in theblood cause the disease, so choice bis incorrect. Nothing in the passage suggests that women who havethe syndrome overreact (choice c) or cannot afford treatment (choice d).