Concept:An increase in quantity supplied is a movement along the same supply curve caused by a rise in price.Explanation:The graph shows the price rising from P1 to P2.As a result, the quantity supplied moves from Q1 to Q2 along the same supply curve.There is no shift of the whole supply curve.Therefore, the change represents an increase in quantity supplied, not an increase in supply.Answer:D. an increase in quantity supplied.
