The sex of the offspring depends on

A) whether the child has 23 or 46 chromosomes on their genome.
B) whether the fertilization results in mitosis or meiosis.
C) whether the mother contributes an X or Y chromosome.
D) whether the father contributes an X or Y chromosome.

D) whether the father contributes an X or Y chromosome. The father's sex chromosome (either X or Y) determines the sex of the offspring. The mother has no influence, as she always contributes an X chromosome.