I am positive it is C, so so so sorry if I’m wrong but it should not be
Mother is b+ and o-, and father is a+ and o-
Explanation:
DNA unwraps itself before cell division. It helps that each side of the double helix is in opposite direction of the other. Then the DNA polymerase travels around each strand and binds the complementary nucleotides (DNA's building blocks). The process is called DNA replication.
