The main purpose of the freedmen's bureau was to
a. slaves adjust to their newfound freedom.
b. battle terrorist groups like the ku klux klan.
c. serve as a voice for freed slaves in congress.
d. establish black codes to limit freed slaves’ rights.

The correct answer that would best complete the given statement above would be option A. The main  purpose of the freedmen's bureau was to help slaves adjust to their newfound freedom. Some former slaves exhibited anger toward their former masters, some were very concerned about their futures and concerns, and some ran away immediately. Hope this answer helps. 

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000