An architect is assessing the existing backup strategy and recommending changes to suit the new virtual desktop environment.
Which two critical components should the architect recommend for nightly backup, as they cannot be easily recreated in the event of a disaster? (Choose two.)

A.
User’s Personal vDisks

B.
Pooled desktop master image

C.
Servers hosting StoreFront roles

D.
Servers hosting Delivery Controller roles

E.
SQL Server hosting the XenDesktop database