1. The country of Maravia has severe air pollution,
80 percent of which is caused by the exhaust fumes
of cars. In order to reduce the number of cars on the
road, the government is raising taxes on the cost of
buying and running a car by 20 percent. This tax
increase, therefore, will significantly reduce air pollu-
tion in Maravia.
Which of the following, if true, most seriously
weakens the argument above?
(A) The government of Maravia is in the process of
building a significant number of roadways.
(B) Maravia is an oil-producing country and is able
to refine an amount of gasoline sufficient for
the needs of its population.
(C) Maravia has had an excellent public transporta-
tion system for many years.
(D) Ninety percent of the population of Maravia is
very prosperous and has a substantial
amount of disposable income.
(E) In Maravia, cars that emit relatively low levels
of pollutants cost 10 percent less to operate,
on average, than do cars that emit high levels