An administrator is creating a service profile but receives an error when applying to a blade. The administrator checks the faults tab of the service profile and finds the following error （Refer to the exhibit）. What is the cause of this error？（）
- A vNIC has a Fibre Channel QoS policy assigned
- B vHBA is assigned to a "best-effort" QoS policy
- C vHBA has no QoS policy assigned
- D vHBA is assigned to an incorrect VSAN
- E vNIC has been assigned to an FCoE VLAN