Hundreds of seals have died recently from consuming fish of a certain species that have been contaminated with an industrial chemical that is toxic to mammals, even in small amounts. Yet even though many people also eat fish of that species, none of these people have been harmed as a result.
Which of the following, if true, most helps to resolve the apparent discrepancy above?
The species of fish contaminated by the toxic chemical is not itself harmed by that chemical.
The toxic chemical collects in those parts of the fish eaten by seals but not by people.
Traces of the toxic chemical have been found in some people whose diets include no fish or fish products.
The species of fish contaminated by the toxic chemical comprises a relatively small part of the seals’ total diet.
The toxic chemical remains toxic even after exposure to temperatures higher than those at which the fish is generally cooked.
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?
Some foods can be healthful when cooked even if they are not healthful when eaten raw
Some people who crave sweets are more likely to eat a piece of ripened fruit than they are to eat a piece of candy.
People who crave sweets are more likely to eat a food that contains refined sugar than a naturally sweet food like ripe fruit.
Prehistoric humans probably were not able to distinguish between healthful foods and unhealthful foods without relying on their sense of taste.
Some unrefined foodstuffs are no more nutritious than their refined counterparts.