The correct answer of the given question above would be option C. The sentence that is inverted with the subject underlined is: There was a big group here last night. (Group is underlined.) The subject of this sentence is the word "group".
Answer:
Я ничего не знаю, потому что я сумасшедший. Я сумасшедший, потому что мои друзья сумасшедшие.
Explanation:
I think thew answer is D. "The author supplies the rubuttel that quotes more current research". I'm not 100% sure but it was the best one i could think of. Hope it's right
