A Power 770 customer needs to add additional I/O adapters.  There is no room for the cards， so an I/O drawer must be added. What resource will help identify supported I/O drawers and the maximum number of drawers permitted per loop？（）

• A、I/O Planning Guide
• B、Power Systems data sheet
• C、Power Systems Facts and Features
• D、Run FLRT to recommend I/O features