Answer :
The domain controllers are the computers that store and run the Active Directory database.
What is domain controllers?
The domain controller is one of most type of the server that process request from users within computer domain for authentication.
Domain controllers will control all domain access and also it can block access for unauthorized to domain networks, it is also allowing authorized users to access all directory services.
The Active Directory database is a database that contains all users and device configurations.
Since, domain controller in simply need authenticates in order to perform its function so the domain controller will run the Active Directory database that have data for all users and device.
You question is incomplete, but most probably your full question was
The domain controllers are the computers that store and run which of the following?
The user database
The services database
The Managed Service Accounts database
The Active Directory database
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