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's B. Longer braking distance. While speeding hitting the brakes with a sudden stop could cause an accident.
Non-suicidal self-injury, or self-harm.
You punish yourself for something you did by hurting yourself, that way you feel better, because you think "I did something wrong, but I punished myself for it, so now I'm clean, I'm no longer guilty.
