Refer to Figure 6.9. The marginal utility of the third video game rental is

A) 0.
B) 4.
C) 8.
D) 22.

Marginal utility refers to the additional satisfaction or utility that a consumer gains from consuming one more unit of a good or service. In this context, the marginal utility of the third video game rental would be the difference in total utility between renting three video games and renting two. Without the specific figure (Figure 6.9) to refer to, the correct answer is based on the assumption that the information provided in the choices is meant to reflect the scenario accurately. Thus, if the marginal utility of the third video game rental is given as an option, it is assumed to be the correct answer based on the choices provided.