Which two statements are correct about configuring AutoQoS on a Cisco router？ （）

• A、 AutoOoS can be implemented on only one side of a link.
• B、The interface does not have to have an IP address associated with it.
• C、The AutoOoS feature cannot be configured on a Frame Relay DLCI if a map class is attached to the DLCI.
• D、In a Frame Relay network， AutoOoS cannot be configured if a DLCI is already assigned to the Frame Relay subinterface