Sparrow Airlines is planning to reduce its costs by cleaning its plane

Sparrow Airlines is planning to reduce its costs by cleaning its planes' engines once a month, rather than the industry standard of every six months. With cleaner engines, Sparrow can postpone engine overhauls, which take planes out of service for up to 18 months. Furthermore, cleaning an engine reduces its fuel consumption by roughly 1.2 percent.

The airline's plan assumes that

A. fuel prices are likely to rise in the near future and therefore cutting fuel consumption is an important goal
B. the cost of monthly cleaning of an airplane's engines is not significantly greater in the long run than is the cost of an engine overhaul
C. engine cleaning does not remove an airplane from service
D. Sparrow Airlines has had greater problems with engine overhauls and fuel consumption than other airlines have
E. cleaning engines once a month will give Sparrow Airlines a competitive advantage over other airlines


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