Civil wars are wars fought between different groups that live in the same country. So, the U.S. was fighting itself (basically North vs. South)
B, statistics. It's a research paper, so it should be formal and unbiased. The other three options are silly. In a research paper, you need to cut to the chase.
Hope this helps!
Answer:
(Not the best at creative writing haha)
Explanation:
em dash:
You need to call her- Evelyn- She needs you
Ellipsis:
We were now on our own...
Hyphen:
She was two-years-old
