Concept:Expectation of a future price fall changes current supply because producers adjust the timing of their sales.Explanation:If producers expect the price to fall in the future, they will try to sell more of the product now at the current higher price.This increases the quantity supplied at every existing price level.An increase in supply at all prices causes the entire supply curve to move to the right.This is not just a movement along the same curve, because the change is due to expectations, not a change in the product’s own current price.Answer:D. a shift to the right