Which of the following scenarios best illustrates the effect of a per-unit tax on a good with negative externalities?

A per-unit tax is a charge that the government places on each unit of a good sold, and it is often used to reduce negative externalities, which are harmful effects on society or the environment caused by the production or consumption of a good. For example, if a factory produces a lot of pollution while making its products, the government might impose a tax on each item the factory sells. This tax makes the goods more expensive, which can lead to fewer people buying them and encourages the factory to find cleaner ways to produce. As a result, the factory might reduce its pollution, benefiting the environment and public health. This scenario shows how a per-unit tax can help lessen the negative impact of harmful goods on society.