Its true but it also refers to the nervous system that can be activates by many other thing like sex if the correct place and time is advised.
Answer:
maybe all
Explanation:
I'm smart and good at readomg
Avoid riding on roadways. If there is a sidewalk you could ride on nearby, use it. Drivers get a little nervous if they're sharing the roadway with a bicycle. Avoid riding too long without breaks, you can get tired out and unintentionally harm yourself or others. Drink lots of water on the way, and wear helmets at all times, no matter how stupid you think they make you look. :)
I think it could be either A or D, kind of leaning more towards D. Let me know if this helped!!