Your company wants to start using Google Cloud resources but wants to retain their on-premises Active Directory domain controller for identity management. What ...

Your company wants to start using Google Cloud resources but wants to retain their on-premises Active Directory domain controller for identity management.
What should you do?

A. Use the Admin Directory API to authenticate against the Active Directory domain controller. B. Use Google Cloud Directory Sync to synchronize Active Directory usernames with cloud identities and configure SAML SSO. C. Use Cloud Identity-Aware Proxy configured to use the on-premises Active Directory domain controller as an identity provider. D. Use Compute Engine to create an Active Directory (AD) domain controller that is a replica of the on-premises AD domain controller using Google Cloud Directory Sync.