The formation of a bivalent during meiosis ensures that

A)one chromatid from the mother and one chromatid from the father will segregate together during meiosis I.
B)all four sister chromatids remain together until the cell is ready to divide.
C)recombination will occur between identical sister chromatids.
D)the sex chromosomes, which are not identical, will line up separately at the metaphase plate during meiosis I.