Answer:
Stands for Before The Common Era and is a secular version of BC which means Before Christ
The people of Athens practiced "Direct Democracy", in which each of them are able to vote and influence the government through personal choices. The US, on the other hand, uses "Democratic Republic", which is that the people have the ability to vote for the people that holds closest to their own view, which in turn would affect the government (being a indirect action).
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C. More hunting and gathering was required .
I can only answer for you the last one issue distinct
hope was right