How Does the Epididymis Become Infected

How does the epididymis become infected?

A) The pathogenic microorganisms ascend the vas deferentia from an already infected urethra or bladder.
B) The pathogenic microorganisms are attached to sperm that travel through the genital tract.
C) The pathogenic microorganisms from the tunica vaginalis are transported to the epididymis.
D) The pathogenic microorganisms from the prostate fluid ascend to the epididymis.