What Are Economies of Density as Referred to in the Airline

Multiple Choice

What are economies of density as referred to in the airline industry?

A) Reducing the size of an aircraft used to increase load factor
B) Economies achieved by an airline flying from spoke to spoke in a hub-and-spoke network
C) Economies of scope along a given route
D) Economies of scale along a given route
E) Reductions in average cost as traffic volume decreases