More carbohydrates are eaten per capita in nations where the government spends more per capita on public exercise programs.

　　 Children who do not participate in organized sports tend to eat fewer carbohydrates than children who participate in organized sports.

　　 Consumption of increased amounts of carbohydrates is a popular tactic of runners preparing for long-distance races.

　　 Periods of physical growth require a relatively higher level of carbohydrate consumption than otherwise.

　　 Though carbohydrates are necessary for the maintenance of good health, people who consume more carbohydrates are not necessarily healthier.

　　11. Experts removed a layer of eighteenth-century red paint from a figure in a painting by a sixteenth-century Italian artist, revealing a layer of green paint underneath. Since the green paint dates from the sixteenth century, the figure must have been green, not red, when the painting was completed in 1563.Which of the following, if true, most seriously weakens the argument?

　　 The experts had been commissioned to restore the painting to the colors it had when it was completed.

　　 X-rays reveal an additional layer of paint beneath the green paint on the figure.

　　 Chemical analyses were used to determine the ages of the red paint and the green paint.

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