You answered correctly: A

The SCROTUM is literally the bag of skin that holds the testicles.
The scrotum is made up of loose skin and muscle and it hangs underneath the end of the penis attached to the abdomin. The scrotum contains smooth muscle fibers, that contract under certain conditions such as cold temperatures, or during exercise, fear or sexual arousal. This pulls the testicles closer to the body. When it's warm, or under loose clothing, or in older men, the muscles in the scrotum tend to be more relaxed and the scrotum hangs quite low.


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