Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles Islands.
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Asloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of
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Bsloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on
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Csloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of
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Dsloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on
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Esloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
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正确答案: D