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Sight Study

GMAT-TJ0E4S

Doctors conducted a study of fifty patients as they were investigating a rare sight disorder. They supposed that diabetes was a major predisposition in the onset of the disorder. In conducting the study, doctors found that the blood sugars of patients, on average, were within the normal range.

Before doctors can adequately hypothesize that diabetes is actually NOT a contributing factor to the onset of the rare sight disorder, they would find the answer to which of the following questions most helpful?

A

Are the patients at, above, or below normal weight and height measurements?

B

How many patients have relatives with the same disorder?

C

Have the patients always had normal blood sugar?

D

Does an increase in blood sugars negatively affect the vision of patients already diagnosed with the disorder?

E

Were any of the patients’ blood sugars low when diagnosed with the sight disorder?