To avoid having to add a machine trust account to a PDC for each Windows client in the domain (using the useradd command), a directive can be used in the Samba configuration file. Select the option…

The `name resolve order` directive controls how Samba resolves hostnames, not how machine trust accounts are managed.

`machine map` is not a standard Samba directive for managing machine accounts in this manner; it might refer to an internal mapping but not an automation script.

The `add machine script` directive allows Samba to execute a specified script whenever a new machine account is created, eliminating the need to manually add each machine trust account with commands like `useradd` to the PDC. This script handles the necessary backend operations to integrate new client machines into the domain.

A `logon script` is executed on the client machine after successful authentication, not on the server for machine account creation.

`read only = no` typically refers to share permissions, allowing writes to a share, and is unrelated to machine trust account creation.