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？（）

• A、The p5-570 Express can support DDR2 memory.
• B、The p650 and p5-570 Express provide faster processors.
• C、The p5-570 Express is limited to eight 1.5GHz processors.
• D、Neither the p5-570 nor the p5-570 Express supports Capacity on Demand.