An HP customer would like to discuss IBM system advantages. Their current system platform is a partitioned HP rp8400. Which of the following pSeries systems and advantages should be discussed？（）

• A、p630. Maximum partitions， maximum storage， I/O bus speed
• B、p670. Maximum partitions， maximum memory， number of I/O slots
• C、p655. Maximum number of CPUs， processor speed， number of I/O slots
• D、p690. Maximum number of CPUs， peak system bandwidth， peak I/O bandwidth