A customer has a large amount of data stored on three database servers and is concerned that at present there is no disaster recovery plan in place.  They have an existing tape backup solution that meets their backup window.  In order to analyze potential disaster recovery plans， which of the following questions is the most important？（）

A.In what format are the CAD documents？
B.How much data needs to be backed up from each remote site？
C.What are the current acceptable windows for back up and restore？
D.Are the plants within line-of-sight to enable wireless communication？
E.Can the communication lines cost-effectively be upgraded to a higher level of service？

A.x445 4-way Xeon DP machine using 16 x 512MB DIMMS， ServeRAID 6M adapter and Ultra320 15K Hard Disk drives in a RAID-1 set with an additional two BroadCom Gigabit NICs
B.x366 4-way Xeon MP machine using 16 x 512MB DIMMS， ServeRAID 6M adapter and Ultra320 15K Hard Disk drives in a RAID-1 set with an additional two Intel Gigabit NICs
C.x445 4-way Xeon MP machine using 16 x 512MB DIMMS， ServeRAID 6M adapter and Ultra320 15K Hard Disk drives in a RAID-1 set with an additional two BroadCom Gigabit NICs
D.x445 4-way Xeon DP machine using 16 x 512MB DIMMS， ServeRAID 6M adapter and Ultra320 15K Hard Disk drives in a RAID-1 set with an additional two Intel Gigabit NICs

A.Does the application require a large paging space？
B.What is the anticipated memory/disk cache hit ratio？
C.Does the application support Physical Address Extensions （PAE）？
D.Are there future plans to expand the amount of memory in the system？
E.Do the application availability requirements justify the use of Memory Mirroring technologies？