A graph shows Quantity on the horizontal axis and Price in dollars on the vertical axis. Two upward-sloping supply curves, S sub 1 and S sub 2, and two downward-sloping demand curves, D sub 1 and D sub 2, are plotted on the graph. S sub 2 lies to the right of S sub 1 and D sub 2 lies to the right of D sub 1. There are four points noted on the graph: ? point Z lies at the intersection of S sub 1 and D sub 1 ? point V lies at the intersection of S sub 1 and D sub 2 ? point W lies at the intersection of D sub 1 and S sub 2 ? point X lies at the intersection of S sub 2 and D sub 2. Refer to Figure 3-5. In the market shown, a rightward shift in demand from D1 to D2 could have been caused by Group of answer choices an increase in the number of sellers in the market. an improvement in technology in the production of this good. a decrease in buyers' income (assuming the good is an inferior good). a decrease in buyers