Figure 21-20 The Following Graph Illustrates a Representative Consumer's Preferences for Marshmallows

Multiple Choice

Figure 21-20
The following graph illustrates a representative consumer's preferences for marshmallows and chocolate chip cookies:
-Refer to Figure 21-20. Assume that the consumer has an income of $40. Based on the information available in the graph, which of the following price-quantity combinations would be on her demand curve for marshmallows if the price of chocolate chips were $4?

A) P=$2, Q=3
B) P=$2, Q=9
C) P=$4, Q=3
D) P=$4, Q=9