Which memory conservation technique allows the secure elimination of redundant copiesof memory pages between virtual machines on the host?

Which memory conservation technique allows the secure elimination of redundant copies
of memory pages between virtual machines on the host?

A.
Memory Balloon Driver

B.
VMkernel Swap

C.
RAM Overcommit

D.
Transparent Page Sharing

Explanation:
Memory Provisioning Recommendations for VMware Infrastructure 3 Operational Best
Practices page 7.
Transparent Page Sharing is a process executed frequently by the VMkernel that scans
physical memory to identify redundant virtual machine memory pages. When a match is
found, the physical page is marked read-only. The VMkernel removes the duplicate page
from physical RAM and the page table is adjusted to redirect the virtual machine’s virtual
page back to the read-only page in physical RAM. This mechanism results in increasing
memory that is shared among running virtual machines over time.