A retail customer is looking at ways to reduce power requirements. They are considering deploying two hundred IBM HS22 blades running Red Hat Linux in the IBM BladeCenter E chassis. The customer has already chosen Intel L5640 CPUs to reduce power. Which on-board storage option allows the customer to reduce power consumption of each blade？（）

• A、One 50 GB SATA 1.8 inch SSD
• B、Two 73GB 10K SAS HDD SFF
• C、Two 31 GB SATA 2.5 inch SSD
• D、Two 50GB SATA 1.8 inch SSD