Which of these is MOST LIKELY to act as an incentive that increases demand for fuel-efficient cars? A. a strike by the auto workers' unions
B. a new law that raises the speed limit
C. a rise in unemployment
D. a sharp rise in the price of gasoline

The correct answer is D. A sharp increase in the price of gasoline.

Explanation

The term "incentive" is used to refer to a stimulus that is offered to a person, company, or sector of society to promote a specific behavior. According to this definition, it concluded that the best incentive to increase the demand for fuel-efficient cars is by increasing the price of fuel because if people have a fuel-efficient car they will have to pay more for fuel to a higher price. On the other hand, if they buy a fuel-efficient car, your money spent on gas will be less. Therefore, the correct answer is D. A sharp increase in the price of gasoline.

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.