Conclusion: The airlines should be regulated.
Premises: The increase in price, air collisions, and air rage. Fliers in small markets are at the mercy of predatory carriers.
Assumptions: That deregulation is causing the problems listed above. That there are no benefits that justify the deregulation. That there are no negative effects that would be caused by re-regulation.
A. Because of inflation, a $275 ticket today is actually 10 to 20% less expensive than a $135 ticket was in 1975. Shows that inflation, not deregulation, is causing the increase in price.
Weakens the causal assumption made in the argument. Eliminate A. B. Deregulation has increased the choices available to fliers in terms of both time of flight and carrier.
Shows that deregulation has a benefit. Eliminate B. C. Airlines are currently flying more than five times as many passenger miles per year as they did in 1975.
Shows that an increase in the number of passengers might be causing the problems listed in the argument. Weakens the assumption that deregulation is causing these problems. Eliminate C. D. Compared with passengers in large urban areas, passengers in small markets pay, on average, twice as much per mile flying on domestic flights because their airports are generally served by fewer airlines.
Correct. Strengthens the conclusion that the airlines should be regulated. E. Psychologists have been able to determine no connection between the deregulation of the airline industry and the onset of increased levels of air rage.
Weakens the assumption that deregulation is causing the air rage. Eliminate E.
The correct answer is D.