Figure 5-13 Illustrates the Market for Shared Rides Before the Government

Figure 5-13 illustrates the market for shared rides before the government imposes a congestion tax.
-Refer to Figure 5-13. If the government wanted to achieve the efficient level of shared rides by imposing a congestion tax, the amount of the congestion tax would be ________ per ride.

A) $1
B) $2
C) $3
D) $5