Saudi Arabia
Explanation:
I would say Saudi arabia as it has lots of oil
The Executive branch must receive approval from "the Senate" when appointing heads of executive departments, ambassadors, and Federal Court Judges, since this is one of the most important examples of the system of "checks and balances" that exists in the US.
Their ethnicity / culture / nationality?
If you ever saw the movie Apocalypto, also was apart of the Aztec Culture but as the Mayan, the priest would do the blood-letting and human sacrifice. The answer is B!