Refer to the Above Graph, Which Shows the Market for Beef

Refer to the above graph, which shows the market for beef where demand shifted from D1 to D2. The change in equilibrium from E1 to E2 is most likely to result from

A) a decrease in consumer incomes.
B) an increase in the cost of cattle feed.
C) an increase in the price of pork.
D) a decrease in the tax on beef products.