The Following Data Show the Relationship Between the Number of Drivers

Multiple Choice

The following data show the relationship between the number of drivers who leave for work at 8:00 a.m. ,their average commute times,and their marginal benefit associated with the commute times.
-Refer to the data above.Assuming that a 260-minute commute results in citizens complaining to the local traffic control authorities,the most cost-beneficial solution to reduce commute time would be to

A) build more roads.
B) increase the speed limit.
C) increase the availability of broadband Internet access.
D) impose a toll on using the highway.
E) build a light rail system.