Answer:
DNA, Books or any type of information that can support their claims, Symbols or patterns.
They use the fossils , they use the process of carbon dating and they compare the activities and characteristics of human with other animals such as chimpanzees, gorillas, monkeys and so on in order to study about early humans
Explanation:
18 right to vote
19 banning newspapers
20 double jeopardy
People had slaves to work for them
It's economy droped.
During WWII a lot of money went for weapons, and by the end of it and we entered the Great Depression cause of it.
Guns, Knives and more
