Answer:
Federalism limits government by creating two sovereign powers—the national government and state governments—thereby restraining the influence of both. Separation of powers imposes internal limits by dividing government against itself, giving different branches separate functions and forcing them to share power.
The correct answer is C. It is during this time that Islamic scholars made advancements in technology, literature, philosophy, mathematics, asstronomy and the arts. It is this time where the Islamic world was ruled by caliphates. All Islamic scholars were ordered to gather and translate all of the world's knowledge.
I believe the answer is: D. The Supreme Court decided in favor of Heller, that the Second Amendment allows law-abiding U.S. citizens to own and carry handguns in the district.
The case revolve around Heller Suing District of Columbia because he owned various firearms without military license.
The court ruled that the constitution explicitly guarantee the right to bear arms, which become the reason why the supreme court decided in favor of Heller.