Question ID:PT21 S3 Q16 Passage:Researchers studying artificial sweeteners have long claimed that the perception of sweetness is determined by the activation of a single type of receptor on the tongue called a sweetness receptor. They have also claimed that any given individual molecule of substance can activate at most one sweetness receptor and that the fewer molecules that are required to activate a receptor, the sweeter that substance will be perceived to be. Now, the researchers claim to have discovered a substance of which only one molecule is needed to activate any sweetness receptor. Stem:Which one of the following conclusions is most strongly supported by the researchers’ claims, if all of those claims are true? Correct Answer Choice:CChoice A:The more sweetness receptors a person has on his or her tongue, the more likely it is that that person will find sweet sensations pleasurable. Choice B:In sufficient quantity, the molecules of any substance can activate a sweetness receptor. Choice C:No substance will be found that is perceived to be sweeter than the substance the researchers have discovered. Choice D:A substance that does not activate a sweetness receptor will activate a taste receptor of another type. Choice E:The more molecules of a substance that are required to activate a single sweetness receptor, the more bitter that substance will be perceived to be.