Which of the following does NOT affect the long-run aggregate supply curve?

When we calculate the price elasticity of demand, we use percentages of the average price and the average quantity in order to get the same value for the elasticity regardless of whether the price falls or rises

Indicate whether the statement is true or false

At the market clearing price

A) there is neither a shortage nor a surplus. B) quantity supplied equals quantity demanded. C) the supply and demand curves intersect. D) all of the above are correct.