During the preparation phase of the incident response lifecycle, organizations focus on establishing readiness before any incident occurs. Managing Cloud principles explain that preparation includes identifying potential threats, evaluating vulnerabilities, and assessing risks that could impact cloud operations.

Risk assessments are a core activity in this phase because they help organizations understand which assets are most critical, what threats are likely, and where controls must be strengthened. Performing risk assessments allows security teams to define incident response procedures, allocate resources, establish escalation paths, and ensure tools and personnel are prepared.

The other options occur in later phases. Taking systems offline is part of containment, estimating the scope of the incident occurs during detection and analysis, and building a timeline of attack supports post-incident analysis. Therefore, performing risk assessments is the correct countermeasure during the preparation phase.