This movement began in the late nineteenth century by prominent African-American activists and urged former
slaves and descendants of slaves to return to their native
homeland.

The Back-to-Africa movement eventually began to decline, but would see a revival again in 1877 at the end of the Reconstruction era, as many blacks in the South faced violence from groups such as the Ku Klux Klan.

Explanation:

D.successful because there were no legal protections for unions.

The u.s. got world power