A customer requires an 8-way 16GB AIX system. They are evaluating the following three systems： ？ p5-570 ？ p5-570 Express ？ p650 The pSeries technical specialist has been asked to explain the pros and cons of the three solutions. What information will help the customer decide on the best solution for their environment？（）
- AThe p5-570 Express can support DDR2 memory.
- BThe p650 and p5-570 Express provide faster processors.
- CThe p5-570 Express is limited to eight 1.5GHz processors.
- DNeither the p5-570 nor the p5-570 Express supports Capacity on Demand.