Question

which government agency analyzed data to ensure african-americans were receiving fair treatment at the polls?○ naacp○ census bureau○ voting rights department○ justice bureau

Explanation:

The NAACP is a non-governmental civil rights organization, not a government agency. The Census Bureau focuses on population counting and demographic data, not polling fairness enforcement. There is no official "Voting Rights Department" as a standalone U.S. government agency. The Justice Department (often referenced in this context as the relevant bureau) enforces voting rights laws, including analyzing data to ensure fair treatment of African-Americans at polls.

Answer:

Justice Bureau