An IT services provider， has a new requirement for you to be able to field general calls concerning System x Servers as a backup function for a tech support person in your company. You have been told to pass on anything that requires more of a solutions-based answer and only answer questions regarding what option goes with what servers.  What tool best accomplishes this task？（）

• A、IBM Configurations and Options Guide
• B、IBM Server Proven
• C、IBM System x Sales Configuration Aid
• D、IBM xREF Sheets
• E、IBM Standalone Solutions Configuration Tool