In Part 2, Chapter 7, Winston's dream about his mother and sister mainly shows that as
a. he realizes his mother's weakness, tries
to forget his family's dark past
b. he moves up the ranks of the Party, he becomes crueler and more ruthless
c. he gets closer to Julia, he uncovers memories of the past and other people he loved
d. he rebels against the Party, he wants to find his mother and sister