Final Answer:
The blood vessels supplying the testis and epididymis are contained in the spermatic cord. Option B is the answer.
Step-by-step explanation:
The spermatic cord is a structure that extends from the abdominal wall into the scrotum, providing support and containing various structures, including blood vessels, nerves, and the vas deferens. Specifically, the blood vessels within the spermatic cord include the testicular artery and the pampiniform plexus of veins. The testicular artery supplies oxygenated blood to the testis, while the pampiniform plexus helps regulate the temperature of the blood before it reaches the testis.
The other structures mentioned—corpus spongiosum, corpus cavernosum, and vas deferens—have different functions and do not contain the blood vessels supplying the testis and epididymis.
Option B is the answer.