Answer:
A) give sellers the incentive to account for the external effects of their actions.
Explanation:
The effect of levying a tax that represents the cost of the externality could lead to one of two outcomes:
For example, the most common example of an externality is pollution, therefore, the industrial sector operates in a market characterized by negative externalities. If the government levied a tax on factories accounting for the pollution they produce, these factores either would increase prices, or try to reduce pollution.