What should you include in the recommendation?

Your network contains an Active Directory domain named contoso.com. The physical topology of the network is configured as shown in the exhibit.
Each office contains 500 employees.
You plan to deploy several domain controllers to each office.
You need to recommend a site topology for the planned deployment.
What should you include in the recommendation?

More than one answer choice may achieve the goal. Select the BEST answer.
Exhibit

A.
Five sites and one site link

B.
Three sites and three site links

C.
One site

D.
Five sites and three site links

Explanation:
Create a site for each LAN, or set of LANs, that are connected by a high speed backbone, and assign the site a name. Connectivity within the site must be reliable
and always available. This would mean 5 sites Site links are transitive, so if site A is connected to site B, and site B is connected to site C, then the KCC assumes
that domain controllers in site A can communicate with domain controllers in site C. You only need to create a site link between site A and site C if there is in fact a
distinct network connection between those two sites.
This would mean 3 sitelinks
So answer is “Five sites and three site links”
Defining Sites and Site Links
http://technet.microsoft.com/en-us/library/cc960573.aspx