You need to configure the People Picker control to display only users who are members of organizational units (OUs) named Managers and Contractors

Your network contains an Active Directory forest The forest contains a single domain named
adatum.com.
The network contains a SharePoint Server 2013 server farm. The farm contains a single web
application named Web1. Users connect to Web1 by using the URL http://webl.adatum.com.
You need to configure the People Picker control to display only users who are members of
organizational units (OUs) named Managers and Contractors.
What should you do?

A.
Modify the User Information List of the site collection.

B.
Set the Peoplepicker-setsiteuseraccountdirectorypath property of the site collection.

C.
Set the Peoplepicker-searchadforests property of the site collection.

D.
Modify the User Policy of Web1.

Explanation:
* Operation name: Setsiteuseraccountdirectorypath
Sets the site user account directory path to a specific organizational unit (OU) in the same domain
when the url and pathparameters are specified.
* Example
To set a list of users to a specific OU (for example, Sales) in the Contoso Corp domain, use the
following syntax:
stsadm -o setsiteuseraccountdirectorypath -path “CN=Sales,DC=ContosoCorp,DC=local” –url
http://server_name