According to theCHFI v11 Procedures and Methodologydomain, theIncident Response Process Flowfollows a structured sequence to ensure incidents are handled efficiently, lawfully, and with minimal impact. Once an incident is detected andstakeholders such as management, third-party vendors, and affected clients are informed, thenext immediate priority is containment.

Containmentfocuses onlimiting the scope and impact of the incidentto prevent further damage, data loss, or lateral movement by the attacker. This may include isolating affected systems, blocking malicious IP addresses, disabling compromised accounts, segmenting networks, or applying temporary firewall rules. CHFI v11 emphasizes that containment must be executed swiftly to preserve evidence while stopping the ongoing threat.

The other options represent different phases of the incident response lifecycle.Incident triageandincident recording and assignmentoccur earlier, during detection and initial response.Eradicationis a later phase that involves removing malware, closing vulnerabilities, and eliminating attacker persistence—but only after the threat has been successfully contained.

CHFI v11 explicitly states that failing to prioritize containment after notification can allow attackers to continue exploiting systems, leading to greater organizational and legal consequences. Therefore, the correct and CHFI v11–verified immediate priority isContainment, makingOption Athe correct answer.