Answer:
The correct answer is A.
Explanation:
Giving the following information:
The equilibrium quantity in the market for widgets is 200 per month when there is no tax. Then a tax of $5 per widget is imposed. As a result, the government can raise $800 per month in tax revenue.
We need to find the level of demand that allows the government to raise $800 per month.
Q=Total Tax/Unitary Tax
Q= 800/5
Q= 160
The new equilibrium is 160 units. Therefore, the equilibrium has fallen 40 units.