Your large and frequently changing organization's user information is stored in an on-premises LDAP database. The database includes user passwords and group and...

Your large and frequently changing organization's user information is stored in an on-premises LDAP database. The database includes user passwords and group and organization membership.
How should your organization provision Google accounts and groups to access Google Cloud resources?

A. Replicate the LDAP infrastructure on Compute Engine B. Use the Firebase Authentication REST API to create users C. Use Google Cloud Directory Sync to create users D. Use the Identity Platform REST API to create users