You implement an intranet site by using Microsoft SharePoint Online. The site uses the default Team Site template. Users create 75 subsites. Many of the subsites do not inherit the permissions of the parent site. You need to provide a user named Adminl with the ability to administer all the intranet subsites. You must achieve this goal by using the minimum amount of administrative effort. What should you do?
From the SharePoint Online administration center, add a User Profile Property named Administrator and set the property value to True for Admin1.
From the site settings of the root site, assign Admin1 the Full Control permission to the root site.
From the site settings of the root site, add Admin1 to the Hierarchy Managers group.
From the site settings of the root site, add Admin1 to the Site Collection Administrators group.
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