The following graph shows the market for donuts in New York City, where there are over a thousand donut shops at any given moment. Suppose the price of muffins decreases. (Assume that people regard donuts and muffins as substitutes, and that donuts and muffins are sold by different stores.) Show the effect of this change on the market for donuts by shifting one of the curves on the following graph, holding all else constant. O Supply Demand Supply PRICE (Dollars per donut) Demand QUANTITY (Donuts)