Answer:
a. People respond to incentives.
Step-by-step explanation:
Assuming the state of Wyoming passes a law that increases the tax on cigarettes thereby causing smokers who live in Wyoming to start purchasing their cigarettes in surrounding states.
Consequently, an increase in the tax on cigarettes altered the behavior of the smokers in Wyoming, it made them to purchase from neighboring states.
This illustrates or reflect the fact that people respond to incentives.