Answer:
D. He expects the Colonel to pay fair wages to him and his wife and also grant them their freedom. In the letter, Anderson expresses his gratitude for the colonel providing him with clothing and medical care during his years of service, but he also states that he and his wife should have been granted their freedom and paid fair wages for their labor. He says that he and his wife have been denied both of these things, and he believes the Colonel owes them this.