You have seven DNS servers that hold an Active Directory–integrated zone named csmpub. local. Three of the DNS servers are in the Chicago site, which is connected to three other sites through a WAN link with limited bandwidth. Only users in the Chicago site need access to resources in the csmpub. local zone. Where should you store the csmpub. local zone?

Custom application partition.

Explanation:

The user has several DNS servers identified as csmpub.local which still contain the following region. These of that same DNS servers seem to be on the website in Chicago, which is linked to three certain websites via a bandwidth-limited WAN connection.

Just Chicago website clients require connection to the information well into the csmpub.local area. However, csmpub.local area would be stored in Custom application partition.