Which of the Following Is True About the Period of Reconstruction

Which of the following is true about the period of Reconstruction?

A) African Americans in the South could not vote or hold political office.
B) Black Southerners did not take advantage of the 15th Amendment to the Constitution.
C) African Americans in the South opened many small businesses and schools, could vote, and held political office.
D) African Americans in the South could not purchase land or houses or start businesses.
E) The Freedman's Bureau was used to halt racial freedom in the defeated Confederacy.