I think the answer is c. it looks quite accurate.
Answer:
Cities were at the center of all early civilizations. People from surrounding areas came to cities to live, work, and trade. ... Cities concentrated political, religious, and social institutions that were previously spread across many smaller, separate communities, which contributed to the development of states.
Explanation:
Stated by khan academy
It would be B. The policy or practice of keeping blacks and whites apart.
