A customer’s new rack contains 12 x p655 servers.   The customer currently has an HMC with one 128-port async adapter with a rack mounted 16-port RAN. The HMC is already attached to two pSeries p630s.  What upgrades， if any， are needed to the HMC to support the new p655 servers？（）

• A、No upgrades are needed.
• B、Add another 16-port RAN.
• C、Add an 8-port async adapter.
• D、Add an additional 128-port adapter.