Sentence Correction

Polio, although it is eradicated in the United States, it continues elsewhere and is able to be brought into the country by visitors.
[spoiler]
(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[/spoiler]
(E) Although eradicated in the United States, polio continues elsewhere and could be

Correct answer E

I am stumped with this question.
Although is a coordinating conjunction use to join two clauses.
Even some famous Dictionary says that Although is usually placed at the beginning of its clause
But in answer choice e the first part "eradicated in the United States" is not a clause.

So is it feasible to use Although in such format?

I have a OG question in which the sentence was rejected because Although word was not followed by a clause.

Sunspots, vortices of gas associated with strong electromagnetic activity, are visible as dark spots on the surface of the Sun but have never been sighted on the Sun's poles or equator.


(A) are visible as dark spots on the surface of the
Sun but have never been sighted on
(B) are visible as dark spots that never have been
sighted on the surface of the Sun
(C) appear on the surface of the Sun as dark spots ---- Wrong as per OG
although never sighted at
(D) appear as dark spots on the surface of the Sun,
although never having been sighted at
(E) appear as dark spots on the Sun's surface,
which have never been sighted on

OG explanation for wrong answer : Although typically introduces a subordinate clause, which has a subject and a verb, but
here there is no subject and sighted is not a complete verb.[/spoiler]


Please let me know if I am making any mistake.