Your company plans to deploy a SharePoint Server 2010 Service Pack 1 (SP1) server farm.
You are designing a maintenance strategy for the farm.
You plan to apply critical Windows updates to the servers in the farm once a month.
You need to recommend a strategy to ensure that the installation of Windows updates will not
prevent users from searching for content in SharePoint sites.
What should you include in the recommendation?

A.
multiple crawl databases

B.
multiple host distribution rules

C.
multiple query servers

D.
multiple Search service applications