A and C could be the answers according to me
Answer:
C. the massive influx of African Americans via migration
Explanation:
The following issues that did not contribute to the racial tensions facing African Americans living in Oklahoma was the massive influx of African Americans via migration.
This option is correct, because the other options give reasons for the increased racial tensions of African Americans in the country.
Violations of the Versailles treaty
Views of Euclid's Parallel Postulate in Ancient Greece and in Medieval Islam? i hope it helps