Which of the Following Statements Regarding Haig's Theory of In-Utero

Which of the following statements regarding Haig's theory of in-utero parentoffspring conflict is true?

A) Maternal genes should be selected to transfer as many nutrients to the fetus as it requires.
B) Hormones produced by the placenta manipulate the in-utero environment in ways that benefit the fetus at a cost to the mother.
C) Fetal-derived cells cannot invade the maternal endometrium during implantation.
D) Selection will not favor maternal genes that code for resisting invasion of the endometrium by fetal-derived tissues.
E) Fetal genes should be selected to respect the maternal optimum for nutrient transfer to preserve the mother's future reproductive success.