Answer:
b. epididymis/vas deferens/ejaculatory duct/urethra
Step-by-step explanation:
The male reproductive organs are those which produce sperm and transport them during coitus. 
 the correct order for the structures sperm pass through as they travel toward the penis: 
- Epididymis is the structure where sperm matures and stored till ejaculation. 
- Vas Deferens a long tube which conducts sperm from the testes to the ejaculatory duct. 
- Ejaculatory duct is a duct which is formed by the union of the vas deferens with the duct of the seminal vesicle. It releases sperm into the urethra. 
- Urethra is a canal which conducts semen to the outside of the body via the penis.