A pSeries technical specialist is performing a solutions assurance with a customer for a new single-frame 10-node p655 system being attached to a currently installed HMC. Which of the following questions should be asked to gather all the required information to determine whether the p655 solution can connect to the HMC？（）

Are there at least ten RS-232 ports available on the HMC？
B. Are there at least ten RS-422 ports available on the HMC？
C. Are there at least ten RS-232 and two RS-422 ports available on the HMC？
D. Are there at least two RS-232 and ten RS-422 ports available on the HMC？