Until the onset of puberty humans cannot produce active reproductive cells
Im pretty sure it's "D"... Hope this helps! :)
It is stored in the Vas deferen, and when needed, it is moved into the testes. When a man and a woman are having a sexual intercourse, semen leaves the tip of the penis, and along come the sperm. I like answering these kind of questions, so if you need anything, let me know.
It's most definitely C !!!!
