Which of these best describes the actions taken when a VTP message is received on a switch configured with the VTP mode "transparent"？ （）

• A、 VTP updates are ignored and forwarded out all ports.
• B、 VTP updates are ignored and forwarded out trunks only.
• C、 VTP updates are made to the VLAN database and are forwarded out trunks only.
• D、 VTP updates are ignored and are not forwarded.