AcustomerhasaneedforanxSeriesserverforanapplicationrequiring12GBmemorywiththecapacityofupto20GB.TheHDDconfigurationneedstobeasfollows（1）TwodrivesRAID-1fortheoperatingsystem（2）FivedrivesforDatainaRAID-5configurationwithoneHot-Spare（3）Alldriveshavetobeinternal.Whichofthefollowingwillsatisfytherequirementsfortheapplication？（）
A.x366
B.x255
C.x346
D.x455
参考答案：B
