15 In order to determine if treatment X is successful in improving eyesight, a research study was conducted. From a large population of people with poor eyesight, 300 participants were selected at random. Half of the participants were randomly assigned to receive treatment X, and the other half did not receive treatment X. The resulting data showed that participants who received treatment X had significantly improved eyesight as compared to those who did not receive treatment X. Based on the design and results of the study, which of the following is an appropriate conclusion?

Options

A. Treatment X is likely to improve the eyesight of people who have poor eyesight.
B. Treatment X improves eyesight better than all other available treatments.
C. Treatment X will improve the eyesight of anyone who takes it.
D. Treatment X will cause a substantial improvement in eyesight

Answer

A