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A study claims that the combination of vitamin C with vitamin E is more effective...

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A study claims that the combination of vitamin C with vitamin E is more effective for preventing the flu than vitamin C alone. In the study, a group of researchers studied 1132 subjects. The subjects were randomly assigned to out of three study groups. The first group of 310 subjects were instructed to take 600 mg daily of vitamin C. The second group of 418 subjects were instructed to take 600 mg of vitamin C and 200 IU of vitamin E daily. The third group of 404 subjects were instructed to take 600 mg of vitamin C and 400 IU of vitamin E daily. The incidence of flu over a season was recorded. All subjects knew which treatment they were receiving.In this study, which is the control group?the 1132 subjectsthe second group of 418 taking 200 IU of vitamin Ethe third group of 404 taking 400 IU of vitamin Ethe first group of 310 taking vitamin C aloneThere is no control group.This study isblind, but not double-blindnot an experimentnot blind.double-blindnone of the above

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