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.