Many firms provide similar types of airline services with similar types of assets. They each received unqualified opinions from their independent auditors. Yet, Flash Airlines appears to apply its accounting principles more aggressively in income-enhancing ways relative to its competitors. The choices for Flash Airlines in applying generally accepted accounting principles under the accrual basis

of accounting include:
a. depreciable lives for buildings and equipment.
b. estimated uncollectibles for accounts receivable.
c. estimated warranty costs.
d. all of the above.
e. none of the above.

D