Answer:
Correct option is C: as an obstacle to Congressional passage the concern
Explanation:
Option A is wrong because of the use of "being". Using being as the modifier is incorrect and inappropriate for the sentence.
Option B uses "a concern" as if it is only a specific concern, but it is not a concern, instead it should have used "the", and hence it is wrong.
Option D is wrong because of its use of “an obstacle to congressional passage”. This acts more like an appositive and does not provide any sensible meaning that implies that the concern is "an obstacle to congressional passage"
Option E is also wrong because it uses "it", which does not refer to anything in the sentence.
Option C is the correct answer despite it cites AS XY.
