Which of the following statements regarding male reproductive function is FALSE?

A)Sperm formed in the testes enter the epididymis before entering the vas deferens.
B)The seminal fluid is alkaline and rich in nutrients.
C)The Sertoli cells produce androgen-binding protein.
D)Sperm entering the epididymis are fully motile.
E)Most of the seminal volume is provided by the secretions of the seminal vesicles and prostate gland.