Northern Air has dozens of flights daily into and out of Belleville Airport, which is highly congested. Northern Air depends for its success on economy and quick turnaround and consequently is planning to replace its large planes with Skybuses, the novel aerodynamic design of which is extremely fuel efficient. The Skybus’ fuel efficiency results in both lower fuel costs and reduced time spent refueling.

Which of the following, if true, could present the most serious disadvantage for Northern Air in replacing its large planes with Skybuses?

(A) The Skybus would enable Northern Air to schedule direct flights to destinations that currently require stops for refueling.

(B) Aviation fuel is projected to decline in price over the next several years.

(C) The fuel efficiency of the Skybus would enable Northern Air to eliminate refueling at some of its destinations, but several mechanics would lose their jobs.

(D) None of Northern Air’s competitors that use Belleville Airport are considering buying Skybuses.

(E) The aerodynamic design of the Skybus causes turbulence behind it when taking off that forces other planes on the runway to delay their takeoffs.

Given the information about the airline company Northern Air and their problem with Belleville airport, when we evaluate the options for any disadvantages for Northern Air we can say that;

Option A, being able to schedule flights without stopping for refueling is completely an advantage for Nothern Air.

Option B, the decline of the cost of aviation fuel over the next several years can only cause a problem if the amount they will save from their fuel costs and other costs are going to exceed the amount that will be spent on the Skybuses.

Option C, several mechanics losing their jobs is certainly not the most serious disadvantage Northern Air is going to have from this action.

Option D, the fact that none of Northern Air's competitors in the Belleville Airport are buying Skybuses is not a disadvantage for Northern Air.

Option E, the aerodynamic of the Skybus causing turbulence and therefore leading the delay for the take-off could be a serious disadvantage because of its affects to the company's strict flight schedules.

I hope this answer helps.