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1. Fertilization of the egg is also influenced by progesterone. Which of the following statements explain the role of progesterone in fertilization?

I. lt serves as a pathway of the sperm to swim toward the egg.
II. It opens "cation sperm" channels in the plasma membrane surrounding the anterior portion of the sperm tail.
III. It stimulates release of luteinizing hormone from the anterior pituitary.
IV. It allows an influx of Ca ions rapidly and vigorously.

A. 1 & IV
B. II & IV
C. II & III
D. I & II​