Cool weather typically weakens muscle power in cold-blooded creatures. In the veiled chameleon, a cold-blooded animal, the speed at which the animal can retract its tongue declines dramatically as the temperature falls. However, the speed at which this chameleon can extend its tongue does not decline much as the temperature falls. Which one of the following, if true, most helps to resolve the apparent discrepancy in the information above? ["Compared with the muscles in the tongues of most cold-blooded animals, the retraction muscles in the veiled chameleon's tongue are considerably stronger.", 'Most cold-blooded animals are much more active in warmer weather than in cooler weather.', 'In the veiled chameleon, tongue retraction is powered by muscles, whereas tongue extension is driven by energy stored in a rubber band-like sheath.', 'Veiled chameleons are found in a wide range of habitats, including ones with wide variations in temperature and ones with moderate climates.']