Which statement is true about the configuration of AutoQoS on a Frame Relay interface？（）

• A、AutoQoS can be configured from a different subinterface if the DLCI is already assigned to one subinterface 
• B、Multilink PPP (MLP) over Frame Relay must be manually configured on low speed DLCIs 
• C、for low-speed Frame Relay DLCIs with Frame Relay-to ATM interworking, the AutoQoS cannot be configured if a virtual template is already configured for the DLCI 
• D、AutoQoS can be configured on a Frame Relay DLCI only if a map class is attached to the DLCI