Walking. Prehistoric humans came over on a land bridge between Russia and Alaska and worked their way down into south America.
I'm pretty sure (1.) is A, and I know for a fact that (3.) is D because slavery was a regular practice between quarreling tribes. I have no clue what (2.) is. Best of luck.
There were different dictators that ran it, one of the most famous is Joseph Stalin.
The state governor has the power to propose legislation. He or she can privately interpret the constitution, but is not given any judicial powers in this sense, like the state judiciary.
Byzantine Empire and the Turks. I hope this helps!
