While Using a Linked Clone, What Option Should Be Enabled

Multiple Choice

While using a linked clone, what option should be enabled to ensure the parent or snapshot is not deleted or changed?

A) The AutoProtect option should be enabled.
B) The template option should be enabled on the parent.
C) The non-persistent mode should be enabled on the independent disk associated with the clone.
D) The VDI mode should be enabled on the linked clone.