Found throughout Central and South America, sloths hang from trees by Iona rubbery limbs and sleep 15 hours a day, movinq infrequently enouqh that two species of algae grow on its coat and between its toes.
(A) sloths hang from trees by long rubbery limbs and sleep 15 hours a day, moving infrequently enough
(B) sloths hang from trees by long rubbery limbs, they sleep 15 hours a day, and with such infrequent movements
(C) sloths use their long rubbery limbs to hang from trees, sleep 15 hours a day, and move so infrequently
(D) the sloth hangs from trees by its long rubbery limbs, sleeping 15 hours a day and moving so infrequently -
(E) the sloth hangs from trees by its long rubbery limbs, sleeps 15 hours a day, and it moves infrequently enough
在C,D中徘徊，还是选择了错误答案C。看了解释之后还是不太明白：
1，答案说C的错误在于省略后意思就变成了 sloths use their long rubbery limbs to ... sleep，为什么sleep和move是承接to hang省略的呢？为什么它们就不能是承use省的呢？2，为什么D用sleeping和moving来伴随修饰hang呢？我觉得即使要用伴随状语，也应该是the cloth sleep 15 hous a day, hanging from trees by its long rubbery limbs啊？像D那样表述我觉得句子中心错了呀。
请nn们释疑，先谢过！ | 
