What Was the Problem with the Labor Contracts for Many

What was the problem with the labor contracts for many blacks?

A) There were few problems, because of the beneficial attitudes of many Freedmen's Bureau workers.
B) They were rarely done voluntarily, or on an equal basis. Blacks ended up at about the same station as during slavery.
C) Blacks refused to sign them, thinking that whites were trying to trick them into slavery again.
D) The labor contracts were not the main problem. White landowners simply refused to obey their terms.