I don't understand the question
Equilibrium quantity is simultaneously equal to both the quantity demanded and quantity supplied. In a market graph, the equilibrium quantity is found at the intersection of the demand curve and the supply curve. Equilibrium quantity is one of two equilibrium variables. The other is equilibrium price.
Answer:
the answer is d sharecropping
It was one of America's best trading routes, it was used as a commercial, military, and immigrant trail. And then in 18-something they started building it into a train track... I think.