Figure 4-15 -Refer to Figure 4-15.Which of the Following Would Cause the Would

Multiple Choice

Figure 4-15
-Refer to Figure 4-15.Which of the following would cause the supply curve to shift from Supply B to Supply A in the market for butter?

A) a decrease in the price of butter
B) an increase in the price of margarine
C) an increase in the price of milk
D) an improvement in technology that allows firms to use less labor in the production of butter