A user has an application server LPAR with a physical Ethernet adapter. They want to have a database LPAR also connected to the application LPAR via virtual Ethernet. Their security policies require a firewall between the application LPAR and database LPAR. Which of the following virtual Ethernet configurations satisfies the customer’s requirements？（）

• A、The application server，firewall，and database server on the same VLAN
• B、The application server and firewall on one VLAN，and the database server on a second VLAN
• C、The application server on one VLAN，and the database server and firewall on a second VLAN
• D、The application server and firewall on one VLAN，and the firewall and database server on a second VLAN