When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link?（）

• A、All defined VLANs are allowed on the trunk by default.
• B、Each VLAN, or VLAN range, that is specified with the switchport mode command.
• C、Each VLAN, or VLAN range, that is specified with the vtp domain command.
• D、Each VLAN, or VLAN range, that is specified with the vlan database command.