Which of the Following Best Describes the Function of the Blood-

Which of the following best describes the function of the blood- testis barrier?

A) It maintains a differential fluid composition of the seminiferous tubule lumen that facilitates the development of sperm and blocks the access of androgens to the lumen.
B) It maintains a differential fluid composition of the epididymis tubule lumen that favors maintaining high concentrations of androgens in the lumen to facilitate sperm production.
C) It maintains a differential fluid composition of the seminiferous tubule lumen that facilitates development of sperm and protects sperm from the immune system.
D) It maintains a differential fluid composition of the epididymis tubule lumen that facilitates movement of sperm during emission.
E) It maintains a differential fluid composition of the seminiferous tubule lumen that facilitates the entry of inhibin into the lumen, thereby decreasing sperm production.