Joe, a technician, is tasked with finding a way to test operating system patches for a wide variety
of servers before deployment to the production environment while utilizing a limited amount of
hardware resources. Which of the following would provide the BEST environment for performing
this testing?

A.
OS hardening

B.
Application control

C.
Virtualization

D.
Sandboxing

Explanation:
Virtualization is used to host one or more operating systems in the memory of a single host
computer and allows multiple operating systems to run simultaneously on the same hardware,
reducing costs. Virtualization offers the flexibility of quickly and easily making backups of entire
virtual systems, and quickly recovering the virtual system when errors occur. Furthermore,
malicious code compromises of virtual systems rarely affect the host system, which allows for
safer testing and experimentation.