Which of the following statement about DS8000 hard drive technology is correct（）

• A、All types of the 2.5" disk drives offered by the DS8800 system have higher performance than the 3.5" disk drives supported by DS8700
• B、The 2.5" disk drives included on the DS8800 support 6Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC
• C、The 2.5" disk drives included on the DS8800 support 8Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC
• D、The 2.5" 15k rpm drives offered by the DS8800 system support 6Gbps SAS-2