The MAIN purpose of the Freedmen's Bureau was to

Responses
A help formerly enslaved people adjust to their newfound freedom.help formerly enslaved people adjust to their newfound freedom.
B battle terrorist groups like the Ku Klux Klan.battle terrorist groups like the Ku Klux Klan.
C serve as a voice for formerly enslaved people Congress.serve as a voice for formerly enslaved people Congress.
D establish "black codes" to limit the rights of formerly enslaved people.

A help formerly enslaved people adjust to their newfound freedom.