A customer has requested an initial proposal for two x346s to be used as file servers.  They feel that using a direct attached DS4300 with ten 146GB drives will be more than sufficient storage space.  They do not currently own any IBM equipment.  An answer to which of the following questions would be of greatest benefit when looking to enhance the offering at minimal expense and ensure a good end user experience？（）

• A、Has a SATA drive expansion enclosure been considered for the DS4300？
• B、Is there a concern for overall disk subsystem I/O performance？
• C、Has an IBM Director Server been considered to monitor the environment？
• D、What will their storage requirements be over the next 12 months？