During reconstruction, the freedmen's bureau provided a number of services but was rejected by most african americans. and was supported by most white southerners. but lacked the authority to enforce civil rights laws. and was spearheaded by democrats in congress.

The correct statement is "but lacked the authority to enforce civil rights laws."

This can be the only correct answer, as during Reconstruction the Freedmen's Bureau was heavily supported by African-Americans. This was because this federal agency helped in aiding African-Americans with job opportunities and other services. This shows that statement one is incorrect.

During the time after the Civil War, many white southerners were still bitter about the institution of slavery ending. The last thing most of them wanted was for African-Americans to have equal rights/ job opportunities. This shows that the second statement is incorrect.

Lastly, Democrats in the South during this time did not spearhead this agency. This was Northern Republican politicians. This means the last statement is incorrect as well.