When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?

A nice level of -10 provides a higher scheduling priority and would require explicit specification (`nice -n -10`) and often root privileges, not the default `nice` behavior.

A nice level of 0 is the default for processes started without the `nice` command, not when `nice` is used without arguments.

By default, if the `nice` command is invoked without any numeric argument or the `-n` option, it increases the nice value of the executed command by 10 relative to the parent process's nice value (which is typically 0). Therefore, the program will run with a nice level of 10.

A nice level of 20 is the lowest possible priority (highest nice value) and would typically be set using `nice -n 20` or `--adjustment=20`.