In the SDN-WAN solution, the principles that need to be followed in the ISIS Cost design, which of the following description are incorrectly?

In the SDN-WAN solution, the principles that need to be followed in the ISIS Cost design, which of the following description are incorrectly?
A . The COST configuration of the link using the operator’s MSTP in a remote location is larger. It is recommended to configure 1000 to avoid traffic bypassing the wide area link – test error
B . The COST of the WDM or bare fiber link in the same city is the next smallest. It is recommended to configure 200 to ensure that the same city link is the second choice in route calculation.
C . Set the local link COST value to the minimum. It is recommended to configure 10 to ensure that the local link is given priority in route calculation – test error
D . The link COST between the RR and PE equipment is configured with a very large value. It is recommended to configure 10000 to ensure that the RR equipment is only responsible for control plane route reflection and does not forward traffic.

Answer: D