小菜求助各位大神大牛！

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Polio, although it is eradicated in the United States, it continues elsewhere and is able to be brought into the country by visitors.

(A) Polio, although it is eradicated in the United States, it continues elsewhere and is able to be

(B) Polio, although eradicated in the United States, it still continues elsewhere and can be

(C) Although still continuing elsewhere, polio has been eradicated in the United States and could be

(D) Although having been eradicated in the United States, polio still continues elsewhere and is capable of being

(E) Although eradicated in the United States, polio continues elsewhere and could be

此题选e

想问一下各位大牛 如果a选项改为Polio, although eradicated in the United States, continues elsewhere and is able to be的话 对吗？although it is eradicated in the United States这个部分是插入语吗？插入语可以用although这样的连词来引导吗？插入语的形式都有什么呢？

感谢各位大牛解答  本人19号考试 目前水平非常非常一般。。。。

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