A. An increase in input prices will shift the market supply curve to the right.
B. At each price, a horizontal summation of the quantity supplied by each firm will yield the market supply curve.
C. At each quantity supplied, a vertical summation of the price set by each firm will yield the market supply curve.
D. A decrease in the price will shift the market supply curve to the left.
E. The law of supply states that the market supply curve may shift right, shift left, or remain the same as the price increases.