The correct answer is option D) "he was the first African-American elected to a seat in the U.S. Congress". Hiram Rhodes Revels was a Republican U.S. Senator and from this position, the first African-American to serve in Congress. Rhodes Revels was also a minister in the African Methodist Episcopal Church, and he born and died as a freeman.
Sibley Commission recommended that local school systems be allowed to decide if they would act by a probable court order to integrate public schools or if they would close them.