Answer:
A) The bulk of Airline A's profits came from other income which included the sale of some of its fleet.
Step-by-step explanation:
Investment in favor of Airline A would severely be hindered if it is found out that the bulk of Airline A's profits came from other income which included the sale of some of its fleet.
This is because it would mean that Airline A is unable to keep up with its costs and thus is divesting its operations. Divesting is never a good sign for a firm looking to gain advantage in the future. Furthermore this explains why there was a sudden shift from loss making in the previous years to profits in the current year. A detailed inspection would be needed to eliminate uncertainty and as such any investment decisions in favor of airline A would not be justified.
Option B, C and D is efficient management and would make Airline A more lucrative for investment as it would mean management is eagerly looking to cut inefficient operations.
Option E would require more information to weaken the argument.
Hope that helps.