Which of the Following Statements About Sperm Entry Is True

Which of the following statements about sperm entry is true?

A) The fertilization cone formed by microvilli of the egg membrane contracts and draws the sperm inward.
B) The egg phagocytizes the acrosome of the sperm so it can enter the cell.
C) The cilia on the egg membrane beat and sweep the sperm inside.
D) The sperm releases calcium ions, which make the egg membrane permeable to its entry.
E) The egg secretes bindin protein, which allows sperm penetration.