Which of the following is MOST important to review when evaluating the ongoing effectiveness of the IT risk register?

While the costs of mitigation options are important for decision-making, they don't directly reflect the *ongoing effectiveness* of the risk register in tracking and managing the risks themselves.

The ongoing effectiveness of an IT risk register is primarily measured by how well it reflects the current state of risks and supports active risk management. Reviewing the status of identified risk scenarios ensures that risks are being tracked, updated, and addressed, demonstrating whether mitigation efforts are progressing or if new risks have emerged, keeping the register dynamic and relevant.

The cost-benefit analysis is part of the decision process for risk response, not the primary measure of the risk register's ongoing effectiveness as a tracking tool.

Timeframes for risk response actions are a component of risk tracking, but the overall "status of identified risk scenarios" encompasses timeframes, assigned owners, and current mitigation progress, making it a more comprehensive measure of effectiveness.