A network administrator has installed an N7K-F248-25XP module into an existing chassis. The module is powered on， but the interfaces are all in VDC0. What is the reason for this？（）   

• A、 The chassis needs an EPLD upgrade to support the new module type.
• B、 The default VDC cannot support F2 modules.
• C、 The interfaces must be allocated into a VDC for F2 modules only.
• D、 The module has failed GOLD diagnostics， and the switch has isolated the ports to protect the integrity of the system.