A customer wants to run VMWare ESX on an x445 with a large number of virtual machines running Windows 2003 Server as a Disaster Recovery （DR） Site for the production environment.  Which of the following questions would most impact the memory configuration？（）

A.What version of VMWare ESX Server is being considered？

B.Do the systems currently use Double Data Rate （DDR） memory？

C.What is the total number of processors installed in the production systems？

D.What is the total amount of memory currently being used across all the production systems？