For Samba to be able to work as a PDC, some modifications are needed in its main configuration file. Select the THREE options below that show the required actions for this task.

Setting `domain logons = yes` in the `smb.conf` file is critical for Samba to authenticate Windows clients and provide domain logon services, a core function of a PDC.

While logon scripts are often used in a domain, the general statement "logon and account creation scripts" is not a direct `smb.conf` directive or a fundamental server-side configuration requirement for Samba to be a PDC in the same vein as the other options.

The `domain master = yes` directive configures Samba to act as the Domain Master Browser, which is necessary for it to facilitate browsing services across the domain and manage network discovery as a PDC.

The `time server = yes` directive enables Samba to act as an NTP server, but this is an optional feature for a PDC and not strictly required for its core domain controller functionality; furthermore, it does not configure Samba as a WINS server, which is done by `wins support = yes`.

The `security = user` parameter ensures that Samba performs authentication against its internal user database or a configured backend, which is a fundamental requirement for a PDC to manage user accounts and validate logins.