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