Answer:
B. violates the matching principle
Step-by-step explanation:
The direct write-off method makes an accounting period take the bad debt expense for a sale which occur in a previous period. Therefore this expense was deferred over the accounting periods. This violates the matching principles.
The matching principles states the revenues and expenses should be acknowledge on the period they occur. In this case the bad debt expense, occur on the period of sale but, with the direct write-off method it is recognize on a subsequent period, generating a distorsion on the net income of the present and future accounting cycles.