After detecting possible malicious external scanning, an internal vulnerability scan was performed, and a critical server was found with an outdated version of JBoss. A legacy application that is running depends on that version of JBoss. Which of the following actions should be taken FIRST to prevent server compromise and business disruption at the same time?

A. Make a backup of the server and update the JBoss server that is running on it.
B. Contact the vendor for the legacy application and request an updated version.
C. Create a proper DMZ for outdated components and segregate the JBoss server.
D. Apply virtualization over the server, using the new platform to provide the JBoss service for the legacy application as an external service.