A nonessential phrase is a word phrase or clause that is not essential to the meaning of the sentence. An essential phrase is an element embedded in the sentence without nonsensical meaning.
The correct answer should be completely
That's because if it got destroyed, it is already amused that it is complete destruction, since something can't be destroyed just a bit.
A because the narrator knows some of what is going on but does not know the inner turmoil of every character.
