Final answer:
Societies that practice integration handle multicultural populations by encouraging different groups to practice their unique beliefs, supporting the concept of pluralism and preserving cultural diversity.
Step-by-step explanation:
Societies that practice integration deal with multicultural populations by C) Encouraging different groups to practice their unique beliefs. This approach is aligned with the concept of pluralism, in which diverse groups are able to maintain their distinct cultural identities while coexisting within a larger society. In contrast, assimilation involves minority groups conforming to the dominant group's culture and potentially losing their unique cultural identity. Intergroup relations can range from pluralism to assimilation and amalgamation, where groups combine to form a new group identity. It's important to celebrate and preserve the rich cultural diversity that comes with multiculturalism, as it adds to the social fabric and vitality of a society.