As discussed in class, economists believe all of the following about an optimal gas tax except:

Select one:

a.It implies that U.S. gas taxes should be raised relative to current levels.

b.It equals roughly $1.48 per gallon (2020 US dollars).

c.It should be adjusted downward / upward to account for increases / decreases in wholesale gasoline prices.

d.It accounts for the negative externalities arising from road congestion and accidents