Which of the following should be of MOST concern to a risk practitioner reviewing an organization risk register after the completion of a series of risk assessments?

Missed target completion dates for risk action plans signify that identified risks are not being addressed and mitigated in a timely manner. This directly indicates a failure in the risk treatment process, leaving the organization exposed to known vulnerabilities and potential incidents, making it the most immediate and critical concern for a risk practitioner.

Senior management accepting more risk than usual, while potentially concerning, is a management decision and part of risk appetite, not necessarily an immediate failure in the risk management process itself, provided the decision is informed.

While quantitative risk assessment is often preferred, expressing risk in qualitative terms is a valid and common approach, especially when precise data is unavailable, and it doesn't inherently indicate a failure in risk management.

Having many risk scenarios owned by the same senior manager might indicate a potential bottleneck or workload issue, but it does not directly represent a failure to mitigate existing risks as much as missed action plan deadlines.