An internal audit report reveals that a legacy system is no longer supported Which of the following is the risk practitioner's MOST important action before recommending a risk response'

Reviewing historical downtime is useful but does not directly quantify the potential impact of *future* risks specific to an unsupported system or the costs of its mitigation.

Assessing the potential impact of the unsupported system's vulnerabilities and the costs associated with various risk responses (e.g., replacement, isolation, enhanced monitoring, or acceptance) is a fundamental step to formulate an appropriate, cost-effective recommendation. This analysis provides the necessary context for informed decision-making regarding the risk response.

Identifying other legacy systems is a broader inventory task, which does not directly address the immediate and specific risk presented by *this* unsupported system.

Exploring replacement feasibility is a potential risk response, but this action should logically follow a thorough assessment of impact and mitigation costs to determine if replacement is the optimal path.