Virtualization is related to pooling and sharing in a cloud concept.
Through this, the resources are shared. Through this type of computation, it is possible to run applications and services on a common distributed network.
https://www.redhat.com/en/topics/virtualization/what-is-virtualization
Virtual Memory :- is a memory management technique that provides an "idealized abstraction of the storage resources that are actually available on a given machine" which "creates the illusion to users of a very large memory".
Option (A) is correct answer.