What’s the answer?

What was one step that charlemagne took to unite his kingdom? a. he chose a single strong heir to inherit his throne. b. he drove muslim forces out of europe. c. he created and supported schools. d. he declared himself head of the catholic church.

How did ancient civilizations develope its agriculture and protect its population

The federal reserve is responsible for overseeing all a. income tax refunds b. changes in tax policies c. government spending d. depository institutions