Here, the chances are between "conclusion of + noun " and conclusion that + sentence". Using (conclusion that + sentence( makes the original sentence clearer, IMO. That approach leaves us with options C and E, since A is awkward.
In E, tense usage is wrong. "would have" implies sth that we have not been informed. So, the answer is C.
In E, tense usage is wrong. "would have" implies sth that we have not been informed. So, the answer is C.
