再问OG158中its的用法，请指教！

158.With only 5 percent of the world's population, United States citizens consume 28 percent of its
nonrenewable resources, drive more than one-third of its automobiles, and use 21 times more water per
capita than Europeans do.
(A) With
(B) As
(C) Being
(D) Despite having
(E) Although accounting for

答案是E我没问题。但我不知道这里为什么its可以指代world's，ETS好像不喜欢用代词指代前面 N’s 所有格中的名词，为什么这里又可以呢？是不是说如果是it就不能指代N’s中的名词，但its可以指代N’s整个所有格？不知我的理解是否正确，请NN们指教！！！