The order Rodentia, consisting of over 2,000 species constituting over 40% of all mammalian species, varies in size from the massive Capybara to their smallest member, the African pygmy mouse.
                    
                
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                Aconstituting over 40% of all mammalian species, varies in size from the massive Capybara to their
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                Bconstituting over 40% of all mammalian species, varies in size from the massive Capybara to its
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                Cwhich constitute over 40% of all mammalian species, vary in size from the massive Capybara to their
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                Dwhich constitute over 40% of all mammalian species, vary in size from the massive Capybara to its
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                Ewhich constitutes over 40% of all mammalian species, varies in size from the massive Capybara to their
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        正确答案: B