What law describes how movement stimulates the bones to become stronger where the stress is the greatest?

It's Wolff Law

Developed by Julius Wolff in the 19th Century, it stated that the bones in a healthy person will adapt to the loads under which it's placed. That's mean the greater the stress that they experience on their bones, the stronger their bones become

Both B and C

If 80% of the artery is clogged, then blood can only pass through 20% of the artery. Hope it helps!!