Answer:
Option B Change in accounting principle; retrospectively; required.
Explanation:
The reason is that the change is policies are considered in the international accounting standard IAS-8 Accounting policies, estimates and correction of errors. The standard says that the change in depreciation method is considered as a change in accounting policy which must be treated as retrospectively which means that the adjustments must be made to all the previous years using the same depreciation and must reflect the change in Changes in Wquity statement. This change in accounting policy as per the requirement s of the standard, must be disclosed in the notes to financial statements. Furthermore the changes in equity must only be opted if it increases the truth and fairness of the financial statement.