Evergreen Air Center Is the World's Biggest Parking Lot for Unwanted

Evergreen Air Center is the world's biggest parking lot for unwanted aircraft. Airlines pay a monthly fee from $750 to $5,000 to mothball their unneeded airplanes there. Its location is on 1,600 acres of Arizona desert near Tucson. The Southwest climate of dry, warm air serves as a cheap and effective airplane preservative against rust. Evergreen's location is a(n)

A) competency.
B) sustainable advantage.
C) competitive identity.
D) core benefit proposition.
E) innovative distinction.