I’m not sure but I think option D;
To help Americans build their own fallout shelters
Explanation:
United States civil defense refers to the use of civil defense in the history of the United States, which is the organized non-military effort to prepare Americans for military attack.
The main difference between them was that Marcus Garvey believed that the free African-Americans should return to Africa while W.E.B. Du Bois believed that they should stay in America which was now their home and that they should just freely have their culture there. If they returned to Africa it would be very weird for them as many of them did not even know their origin and their languages and their culture.
Persian and Muslim traditions.
Yes there was slavery in the Austin Texas but the Constitution of the republic of Texas made slavery legal in 1863