Refer to the exhibit.

Which recommended practice is applicable?

A.
If no core layer is deployed, the design will be easier to scale

B.
A dedicated campus core layer should be deployed for connecting three or more buildings

C.
If no core layer is deployed, the distribution switches should not be fully meshed

D.
A dedicated campus core layer is not needed for connecting fewer than five buildings

Explanation:
A dedicated campus core layer should be deployed for connecting 3 or more buildings.