17. Epidemiology relies on non-experimental tests of hypotheses. What was Snow's hypothesis and how did he test it without performing experiments.

lincoln declared that slavery should not be allowed to spread into the new states, and of course this angered the south at the time.

mass production/ assembly line production

- a government ruled by the people, or assembly. officials monarchy - a single ruler like a king. over time some city-states, like athens would change governments. what this means is that all the citizens voted on all the laws.

the answer is flapper.

branliest and you.