Which is correct?

On pp. 135-136, Harriet describes receiving a letter from Mrs. Bruce telling her she is
now free. Why does she react to this news with mixed emotions?
A She cried because she had lost all of her children, but she was glad to have her
freedom.
B (She cried because she was old, but she was glad to have her freedom.
C She cried because she had been sold like a piece of property, but she was glad to
have her freedom.
D She cried because she missed Mrs. Bruce, but she was glad to have her freedom