Which statement is true about the SDM QoS wizard and its ability to enable a QoS policy on router interfaces？（）

• A、QoS can be enabled on interfaces used for Easy VPN clients
• B、QoS can be enabled on IPsec VPN interfaces and tunnels
• C、QoS can be enabled on interfaces with an existing QoS policy
• D、the QoS policy can be enabled for incoming and outgoing traffic on the interface