The correct answer is B. always.
They are always coplanar if there exists a geometric plane that contains them all, which indeed exists.
Assuming that you're referring to the excerpt from "My Father Writes to my Mother", the statement that best describes the overall impact of the setting would be: Mother feels empowered when she is in the company of her sisters and cousins.
The mother grew up in a culture where women need to be subservient to her husband. Meanwhile, her sisters and cousins seem to have a different perspective for women's role.
The tone of the story "Talk" by Harold Courlander and George Herzog is humorous.
