f a Cisco switch is configured with VTPv1 in transparent mode， what is done with received VTP advertisements？（）

• A、They are discarded
• B、The contents are altered to reflect the switch’s own VTP database and then they are forward out  all trunking ports
• C、The changes within the advertisements are made to the switch’s VTP database.
• D、The contents are ignored and they are forwarded out all trunking ports.