MULTIPLE CHOICE

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. FIGURE 3-1
-Refer to Figure 3-1. The movement along the demand curve, D, from point v to point x, could becaused by

A) an expectation that new, government regulations will require the use of energy-efficient light bulbs only.
B) an increase in household income, which allows consumers to purchase more light bulbs.
C) a change in preferences away from ordinary light bulbs to energy-efficient light bulbs.
D) a change in the price of ordinary light bulbs.
E) a change in the price of energy-efficient light bulbs.