The answer is All of the above
The statement "Endorphins are generated in the body during exercise, which leads to better emotional health." would be true.
Relax... Your mouth does not have the vasculature that would allow you to bleed out. By this time some healing should have formed but it would still be a raw wound. The best thing you should do is press gauze on the wound, as well as put some alcohol, just to keep out infection. Just see your doctor in the morning.
Your mouth if anything should be fine.
The answer is a which is the tendency to ignore evidence against your beliefs
