You need to investigate a VTP problem between two Company switches. The lack of which two  prevents VTP information from propagating between switches？（）

A.STP root status
B.VTP mode
C.Negotiation status
D.Management domain
E.Configuration revision number

A.Devices use DHCP to request their VLAN.
B.Attached devices are unaware of any VLANs.
C.Devices are assigned to VLANs based on their MAC addresses.
D.Devices are in the same VLAN regardless of which port they attach to.

A.VMPS server lookup is required
B.Easy to configure
C.Easy of adds，moves，and changes
D.Based on MAC address of the connected device