You have a SharePoint Server 2010 Service Pack 1 (SP1) server farm. You have a front-end Web
server and an application server. You discover that when the application server indexes content, it
takes a long time for the front-end Web server to respond to the user requests. You need to reduce
the number of items that the application server can index simultaneously. The solution must ensure
that all content is indexed. What should you configure?

A.
crawler impact rules

B.
crawl rules

C.
host distribution rules

D.
search scopes