What is the function of polar bodies?

What is the function of polar bodies?
  A. They provide nourishment for the developing embryo.
  B. They prevent more than one sperm from entering the egg.
  C. They produce hormones that allow ova to develop properly.
  D. They provide fructose to the semen for sperm motility.
  E. None of these are functions of polar bodies.

Question 2

The phenotypic sex depends most directly on
  A. the presence of a Y chromosome.
  B. the presence of the number of active X chromosomes.
  C. the development of the ovaries.
  D. the influence of hormones.
  E. the degeneration of the Mllerian duct.