FIGURE 3-6 Refer to Figure 3-6

FIGURE 3-6 Refer to Figure 3-6.A shift in the supply curve from S₂ to S₁ might be caused by

A) a rise in the costs of producing good X.
B) a decrease in the price of X.
C) a decrease in demand for X.
D) an improvement in the technology of producing good X.
E) additional suppliers entering the industry.