A customer needs three 2-way application servers and is evaluating the purchase of three p5-520s versus one partitioned 6-way p5-570. They like the benefits provided with dynamic processor sparing. What information should the pSeries technical specialist emphasize to the customer？（）
- AThe p5-570 offers CoD processors.
- BThe p5-570 requires more rack space than the three p5-520s.
- CRedundant power is standard on the p5-570 and is optional on the p5-520.
- DOperating system charges will be less expensive with the p5-520 solution.