Contoso. Ltd., has a public-facing SharePoint site collection. The default site page contains a list that displays
the most popular music tracks played on the site. The sitemap file for the site resides at
http://www.contoso.com/sitemap.xml. Users search for the most popular music tracks by using an external
search engine.
Users observe that the external search engine results contain hundreds of links to the default site page.
You need to exclude the site from being crawled by any external search engines.
What should you do?

A.
On the default site page, create a search engine optimization (SEO) meta tag to exclude the page from
search engines.

B.
On the Search engine optimization setting page, enable the Do not filter link parameter checkbox.

C.
On the search engine sitemap settings page, enter the following internet search engine exclusion:
http://www.contoso.com/sitemap.xml

D.
Create a robots.txt file at http://www.contoso.com/robot.txt in the file, include the following values:
User-agent: *
Disallow: /.