Between B and E, it has to be B because the first rule of inference questions is to stay within the scope of the argument. Even though, B makes a pretty broad generalisation by extending the applicability of the findings from the study group to general applicability to almost anyone by using a generic "those", E talks about beliefs of health food enthusiasts regarding random multiple vitamins (and not about vitamin XYZ). Staying strictly within the scope of the argument, B makes better
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