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