The authors of your text suggest which policy as a way of reducing urban traffic congestion?
A) A federal standard raising the minimum age for a driver's license to 21 years old
B) Requiring motorists to pay a toll or fee based on the costs their driving imposes on others
C) Increasing gasoline taxes
D) Requiring people to drive in car pools
Question 2
In the economic way of thinking, traffic congestion is a sign of
A) a surplus of people.
B) a surplus of automobiles.
C) a shortage of buses.
D) a negative externality.