It owned production, distribution and exchange. Kind of primitive communism.
The answer is A. The freedmen's bureau was created to help former slaves. They didn't help out the whites. They helped blacks only. As for B, if your curious as to what organization did that, it was called the Freedmen's School. :)
The one that will naturally lead to rationing is: C. Trade embargo
In trade embargo, a country will limit the amount of a certain product distribution to another country.
To combat this, it is very common to control the local distribution of that limited product until the conflict has been resolved.