A security incident has been resolved. Which of the following BEST describes the importance of the final phase of the incident response plan?
A. t examines and documents how well the team responded, discovers what caused the incident, and determines how the incident can be avoided in the future
B. t returns the affected systems back into production once systems have been fully patched, data restored, and vulnerabilities addressed
C. t identifies the incident and the scope of the breach, how it affects the production environment, and the ingress point
D. t contains the affected systems and disconnects them from the network, preventing further spread of the attack or breach