Which three steps are required to configure QPPB on Cisco IOS XR routers? (Choose three.)
A. Apply a QPPB route policy to the BGP process using the table-policy command
B. Apply a QPPB route policy to the BGP neighbor using the route-policy command
C. Define a QPPB route policy to match the customer routes, then set the IP precedence or qos- group
D. Define a QPPB route policy to match the customer IP precedence or qos-group markings, then set the BGP community
E. Enable QPPB on an interface using the ipv4 bgp policy propagation input ip-precedence|qos- group destination|source command
F. Enable QPPB on an interface using the ipv4 bgp policy propagation output ip-precedence|qos- group destination|source command