Unlike frogs that metamorphose from tadpoles into adults within a one-year period, it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are restricted to deeper bodies of water that do not dry up in summer or freeze solid in winter.
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Ait takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are
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Bit takes the mountain yellow-legged frog of the Sierra Nevada three to four years until it reaches adulthood, and therefore it is
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Cin the Sierra Nevada, mountain yellow-legged tree frogs take three to four years to reach adulthood, thus being
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Dmountain yellow-legged frogs of the Sierra Nevada take three to four years until they reach adulthood, thus
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Emountain yellow-legged frogs of the Sierra Nevada take three to four years to reach adulthood, and so they are
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正确答案: E