Question ID:PT50 S2 Q19 Passage:Dietitian:  It is true that nutrients are most effective when provided by natural foods rather than artificial supplements. While it is also true that fat in one's diet is generally unhealthy, eating raw carrots (which are rich in beta carotene) by themselves is nonetheless not an effective means of obtaining vitamin A, since the body cannot transform beta carotene into vitamin A unless it is consumed with at least some fat. Stem:The statement that fat in one's diet is generally unhealthy plays which one of the following roles in the dietitian's argument? Correct Answer Choice:AChoice A:It is mentioned as a reason for adopting a dietary practice that the dietitian provides a reason for not carrying to the extreme. Choice B:It is mentioned as the reason that is least often cited by those who recommend a dietary practice the dietitian disfavors. Choice C:It is mentioned as a generally accepted hypothesis that the dietitian attempts to undermine completely. Choice D:It is attacked as inadequate evidence for the claim that nutrients are most effective when provided by natural foods rather than artificial supplements. Choice E:It is cited as a bad reason for adopting a dietary habit that the dietitian recommends.