Aunt Alexandra is concerned that Scout is not ladylike. Option B is correct.
Aunt Alexandra wants Scout to be more lady-like and thinks that because she is a Finch, she should start acting like it.
Aunt Alexandra belongs to a good family and that is very important to her, so that she believes that anyone who has the family name should act a certain way.
Aunt Alexandra does not approve of much that Scout does. In fact, she hates the way she dresses,and cannot accept that Atticus allows her to curse. Besides, she disapproves of her friends.