This is confusing to me because it seems like the network team has already performed the Identification and Containment portions of an incident response plan for whatever problem they're facing, identifying that the network switches are the culprit and taking them out of operation. The next step is then Eradication?
"Eradication is the step in which we eliminate the components related to the incident, such as: Malware installed, Closing down the vulnerabilities that caused the incident in the first place by Patching, implementing new firewall rules, etc…"
I guess it could be D but it seems like they've already begun the IR, no?