What must be disclosed when there is a change in accounting policy according to IAS 8?

When there is a change in accounting policy according to IAS 8, it is essential to disclose the reason for the change in policy. Disclosing the rationale helps users of the financial statements understand the context and implications of the new accounting policy on the financial results. This transparency is critical for maintaining trust and allowing stakeholders to evaluate the effect of the changes on the company's financial position and performance.

The disclosure of the reason provides insights into how the decision aligns with the company’s strategic direction or compliance with new standards. This clarity enables users to assess potential impacts on financial statements and assess comparability with prior periods.

The other options, while they may contain information relevant to the company, do not fulfill the specific disclosure requirements concerning changes in accounting policy as stipulated by IAS 8. For instance, disclosing the financial results of the previous year or a company's profit margin does not directly address the rationale behind the change in accounting policy. The structuring of the management team is unrelated to accounting policies and their disclosure.