The passage suggests which of the following about sanitary conditions in Britain after the Crimean War?
They were worse in military camps than in the neighboring civilian populations.
In the second paragraph, Nightingale’s efforts to reform sanitary conditions in Britain are illustrated by her response to the death rate among enlisted men in British barracks, which is described as unusually high relative to that of neighboring civilian populations. From this it can be inferred that sanitary conditions in the barracks were worse than in these civilian populations.