The human craving for sweets was once beneficial: it attracted people to foods that were healthful (ripe fruit, for example) in preference to foods that were not healthful (unripe fruit, for example). However, now that sugar has been refined, it follows that a craving for sweets is no longer beneficial, because refined sugar is not healthful.
Which of the following, if true, would most strengthen the argument above
A．Some foods can be healthful when cooked even if they are not healthful when eaten raw.
B．Some people who crave sweets are more likely to eat a piece of ripened fruit than they are to eat a piece of candy.
C．People who crave sweets are more likely to eat a food that contains refined sugar than a naturally sweet food like ripe fruit.
D．Prehistoric humans probably were not able to distinguish between healthful foods and unhealthful foods without relying on their sense of taste.
E．(E) Some unrefined foodstuffs are no more nutritious than their refined counterparts.
