Which of the following events is consistent with an increase in the deadweight loss of the gasoline tax from $30 million to $120 million?
a. The tax on gasoline increases from S0.30 per gallon to $0.60 per gallon.
b. The tax on gasoline increases from S0.25 per gallon to $0.45 per gallon.
c. The tax on gasoline increases from $0.30 per gallon to $0.45 per gallon.
d. The tax on gasoline increases from S0.25 per gallon to $1.00 per gallon.