When designing IP addressing for route summarization, which consideration is true?

A.
Summarization can be applied regardless of the network topology if the IP addressing
scheme is structured.

B.
IP address space assignments should be based on the divisions of the company.

C.
Suboptimal routing is commonly caused by the information that is hidden in the summary
route.

D.
Summary metrics are constant, regardless of the instabilities of the summary components.