When designing BGP in SDN-WAN, it is recommended to divide devices with the same configuration into the same group to simplify configuration and maintenance. Which of the following descriptions is incorrect?

When designing BGP in SDN-WAN, it is recommended to divide devices with the same configuration into the same group to simplify configuration and maintenance. Which of the following descriptions is incorrect?
A . All backbone P (P) 1 group
B . All branches PE (BR-PE) 1 group
C . All data center PE (DC-PE) 1 group
D . All RR equipment (RR) 1 group

Answer: A