Question

who was the first african american senator of the u. s?
ulysses s. grant
robert e. lee
frederick douglass
hiram revels

Explanation:

Hiram Revels was the first African - American senator in the U.S. He served during Reconstruction, representing Mississippi in 1870 - 1871. Ulysses S. Grant was a U.S. president, Robert E. Lee was a Confederate general, and Frederick Douglass was a prominent abolitionist but not a senator at that time.

Answer:

D. Hiram Revels