What is the reproductive system and what is sperm

The penis delivers sperm through the urethra. The two testicles (or testes) producesperm and the male sex hormone testosterone. Nest to each testicle, the epididymis is a light‑colored tube where sperm is stored. ... In the human reproductive process, two kinds of sex cells, or gametes, are involved.

Though i must say, this is quite inapprrporiate.

Hello~

The reproductive system is an organ system that most animals and all humans have. It is a system of organs which are for the purpose of sexual reproduction.  
Sperm is a reproductive cell which is in only males, and it fertilizes the female egg during sexual reproduction to create an embryo.

Hope this helps~!

The correct answer is c