You are using VTP version 2 in your network to transport VLAN information between switches. When adding a switch to the network that has been used in the lab previously， you notice that a lot of the existingVLANs have been deleted or replaced with other names. What can you do to prevent this from happeningin the future， without losing all VTP features that you are using today？（）

• A、configure a hard-to-guess VTP domain name
• B、use a hard-to-guess VTP password
• C、use VTP transparent mode
• D、implement VTP version 3