Scientist: To study the comparative effectiveness of two experimental medications for athlete' s foot, a representative sample of people with athlete' s foot were randomly assigned to one of two groups. One group received only medication M, and the other received only medication N. The only people whose athlete' s foot was cured had been given medication M. Reporter: This means, then, that if anyone in the study had athlete' s foot that was not cured, that person did not receive medication M. Which one of the following most accurately describes the reporter's error in reasoning? ["The reporter fails to allow for the possibility that athlete's foot may be cured even if neither of the two medications studied is taken.", "The reporter presumes, without providing justification, that there is no sizeable subgroup of people whose athlete's foot will be cured only if they do not take medication M.", 'The reporter illicitly draws a conclusion about the population as a whole on the basis of a study conducted only on a sample of the population.', "The reporter concludes from evidence showing only that M can cure athlete's foot that M always cures athlete's foot."]