Linda’s argument has a cause-effect relationship and a comparison element as well.
The causal argument is that the safety of women (or low mortality among women) is dependent on the hygiene awareness among the doctors.
The comparison element is that women today are better off than the women in the 1800s.
If Fiona is to question Linda’s argument, she has to establish that one of these two (the causal and the comparison) relationships do not actually hold true. This is the reason that Fiona’s argument tries to establish that awareness is not enough. Mortality is also affected by the actual practices of the doctors.
To further weaken Linda’s argument, the correct answer Option must extend this discussion or question whether women today are actually better off than the women from the 1800s.
Option (B) can be eliminated because we do not know whether these hospital-acquired infections were because of poor practices of the doctors or because of other factors.
Option (C) can be eliminated because the option adds further support to Linda’s argument, when in fact the objective is to weaken her argument.
Option (D) can be eliminated because the option again adds support to Linda’s argument.
Option (E) seems to imply that the nurses do not have proper practices in place. At first glance, the option seems to work. However, the option assumes that doctors do not adhere to the schedules, implying that nurses are as bad. Nurses and doctors could both be GOOD at sticking to the cleansing schedules. Moreover, the focus of the discussion is on the practice of doctors and not of nurses.
Option (A) works because it establishes another reason for carelessness among doctors when it comes to hygiene. If doctors believe they do not carry pathogens, they are more likely to be careless about cleansing schedules.
Option A is the correct answer.