Which statement best describes the process of playing sports?
a. no pain, no gain.
b. rules are meant to be broken as long as nobody gets hurt.
c. you should understand the risks of each sport and listen to your body.
d. none of the above

The answer is C. You should understand the risks of each sport and listen to your body. 
Don't exercise to the point where your body is in so much pain you can't handle it. A bit of pain is good sometimes, but you always need to be aware of what your body is capable of doing and don't overdo it. 

C. You should understand the risks of each sport and Listen to your body..

I hope this helps!

Both the han and the roman empire decline as a result of social unrest during their collapse.