Figure 4.2.3. -Look at Figure 4.2.3. at a Price of $12, How

Multiple Choice

Figure 4.2.3.
-Look at Figure 4.2.3. At a price of $12, how many units are sold in the market?

A) 20 units
B) 30 units
C) 40 units
D) zero units
E) none of the above