1) is
2)am
3)am
4)is
5)is
6)is
7)have
8)is
9)is
10)is
11)have
12)is
13)is
14)is
15)are
Answer:
groups by the fact that they share a common interest, background, or purpose that gives them a sense of cohesion
I find all of the answers pretty neutral (that is, giving only facts, no judgements) except on sentence 3: this is because of the word "sharply".
It seems that the author of this sentence makes a judgement about the split: that they're very split, that their argument was very intense. It seems like a judgement to me more than the other sentences.