Which of the following is the BEST indication that key risk indicators (KRIs) should be revised?

If risk thresholds are frequently being breached or exceptions are increasing, it implies that the existing KRIs are either not effectively predicting risk events or that the thresholds themselves are misaligned with the organization's true risk exposure. This directly points to the need to re-evaluate and potentially revise the KRIs to ensure they remain relevant and effective.

An increase in change events pending management review relates to change management process efficiency, not directly to the effectiveness or need for revision of KRIs.

A decrease in Key Performance Indicators (KPIs) does not directly indicate that KRIs need revision, as KPIs measure performance, while KRIs specifically measure risk indicators.

A decrease in the number of critical assets covered by risk thresholds might indicate issues with asset management or scope definition, but it does not imply that the existing KRIs themselves are flawed and need revision.