Refer to the exhibit. Which statement is true about a voice VLAN？（）

• A、 Physically the voice network and the data network are separate.
• B、 The voice traffic will normally be on a different IP subnet than will the data traffic.
• C、 End user intervention is necessary to place the phone into the proper VLAN.
• D、 The same security policy should be implemented for both voice and data traffic.
• E、 The data VLAN must be configured as the native VLAN.