Final answer:
The correct option is c. The combining form for the area where sperm are stored is 'epididym/o', representing the epididymis, which is responsible for the maturation and storage of sperm cells in the male reproductive system.
Step-by-step explanation:
The combining form for the area where sperm are stored is 'epididym/o'. The epididymis is a crucial part of the male reproductive system where sperm mature and are stored until they leave the body during ejaculation. It consists of a tightly coiled tubule located atop the testis within the scrotum and is divided into three parts, namely, the head, the body, and the tail.
Mature sperm cell remains in the epididymis until ejaculation, and during this time, they gain motility and the ability to fertilize the female ovum. It is essential for the maturation of sperm as they develop distinctive features such as a tail for motility, and it also plays a key role in their storage.