People get more than pleasure from seeing trees. Seeing trees can be good for people’s physical health. That this is

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People get more than pleasure from seeing trees. Seeing trees can be good for people’s physical health. That this is so is shown by a comparison of a large group of hospital patients who had a view of trees from their rooms and a similarly large group of hospital patients who did not. The patients with a view of trees returned to health faster.

Which of the following would it be most useful to establish in order to evaluate the argument above?


A. Whether the trees that could be seen from the hospital rooms were, for the most part, equally healthy and well grown

B. Whether the two groups of patients were well matched with respect to the nature and severity of the conditions for which they were hospitalized

C. Whether the patients in both groups knew that their recovery times were being compared

D. What proportion of all of the patients contracted an infection while in the hospital

E. What proportion of all of the rooms in the hospitals from which the two groups were drawn had a view of trees


OA B

Source: GMAT Prep