Answer:
When we overuse a joint, the bursae become inflamed, resulting in bursitis, a condition in which the bursae lose their function and the movements become painful. Excessive use of some joints can cause bursitis in sports like cycling, tennis, and long-distance running.
I believe because of their innocence behavior about almost everything. They wouldnt lie as much as adults because they are not aware of their surroundings yet and the consequences of every thing they say or do
Now that I think about it, it would be A and B because you need your bones for support and they also protect your organs. As for D it's the other way around your muscles help your bones move.
D, by allowing that they never engage in risky behaviors. Knowledge about health can help people understand why some things are risk and why some things aren't.