The spread of Islam changed many countries. The religion quickly spread and many countries of power classified themselves as Muslim countries. This united the countries in a religious manner and all of the Muslim countries were led and ruled by a khalifah. The united rule helped Muslims achieve victory over battles that would change the face of the Earth.
The correct answer is Siberia
Federalism is the system of government in which power is divided between a central government and regional governments; in the United States, both the national government and the state governments possess a large measure of sovereignty.
The answer is A! :) hope this helps