Which of the following commands would you run to add your machine to an NT4 domain?

The `net rpc join` command is the appropriate utility for joining a Samba server to a Windows NT4 domain. The `-S` flag correctly designates the PDC server to join, and `-U` provides the necessary administrative username and password for authentication.

`net ads join` is specifically designed for joining Active Directory domains, not NT4 domains, and `-s` is not the correct flag for specifying the PDC in this context.

While `net rpc join` is the correct command, the `-s` flag is typically used to specify the Samba server's own NetBIOS name, not the target PDC; the correct flag for the PDC is `-S`.

`net ads join` is for Active Directory domains, not NT4, and the flags `-W` and `-n` are incorrect or misused in this context for domain joining.