Did you read the book? If so, you should have a clear idea of the situation of Black women in America. Does your assignment ask about Black women, or just women? Because, as the book made very clear, the position of Black women in America was very subservient to that of White women in America. But among themselves, the Black women held a position of power in some families, but were very much abused in others. The situation of White women in Africa was that of royal princesses. They never worked, they were cared for by others, and the contributed nothing. Black women in Africa held responsible positions in their own communities.
I think you have to clarify which groups of women you are supposed to be comparing and constrasting, as the field is too wide as presently stated.
Just a suggestion, but you are always better to read the book if your assignment is based on the book. Hollywood has a way of changing things, eliminating characters, tacking on a happy ending and otherwise altering the story from what was originally written. If you do a book review based on a movie, you can wind up looking pretty silly!