You are the SharePoint administrator for a company’s SharePoint Online tenant. The company merges with another company, and the number of users has grown
400 percent over the last month. You plan to hire SharePoint site collection administrators.
The additional administrators must have permission to only manage site collections that you assign to them.
You need to assign the correct permissions to the administrators.
Which permission level should you grant to the administrators?

A.
Global admin

B.
SharePoint Online admin

C.
Site Collection admin

D.
Site admin

E.
User Management admin

Explanation:
Site collection administrator is a user with administrator permissions to manage a site collection.
Incorrect:
Not A: Global administrator is an administrator of the Office 365 portal; can manage service licenses, users and groups, domains, and subscribed services. In
Office 365, a Global administrator is also a SharePoint Online administrator.
Not B: SharePoint Online administrator
Administrator of the SharePoint Online Administration Center; can create and manage site collections, designate site collection administrators, determine tenant
settings, and configure Business Connectivity Services and Secure Store, InfoPath Forms Services, Records Management, Search, and User Profiles. In Office
365, a Global administrator is also a SharePoint Online administrator.
Manage administrators for a site collection
https://support.office.com/en-us/article/Manage-administrators-for-a-site-collection-9a7e46f9-3fc4-4297-955a-82cb292a5be0#__toc341786265