You need to disable the global catalog on DC1

Your network contains an Active Directory forest. The forest contains two domains named contoso.com and corp.contoso.com. All domain controllers run windows
Server 2016 R2 and are configured as global catalog servers. The corp.contoso.com domain contains a domain controller named DC1.
You need to disable the global catalog on DC1.
What should you do?

A.
From Active Directory Users and Computers, modify the properties of the DC1 computer account.

B.
From Active Directory Administrative Center, modify the properties of the DC1 computer account.

C.
From Active Directory Sites and Services, modify the NTDS Settings of the DC1 server object.

D.
From Active Directory Domains and Trusts, modify the properties of the corp.contoso.com domain.

Explanation:
To add or remove the global catalog

Open Active Directory Sites and Services. To open Active Directory Sites and Services, click Start, click Administrative Tools, and then click Active Directory Sites
and Services.
To open Active Directory Sites and Services in Windows Server® 2012, click Start, type dssite.msc.
In the console tree, click the server object to which you want to add the global catalog or from which you want to remove the global catalog.
Where?
Active Directory Sites and Services\\Sites\\SiteName\\Servers
In the details pane, right-click NTDS Settings of the selected server object, and then click Properties.
Select the Global Catalog check box to add the global catalog, or clear the check box to remove the global catalog.