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Which of the following statement(s) is/are True regarding ‘nice’ command of UNIX ?

I. It is used to set or change the priority of a process.

II. A process’s nice value can be set at the time of creation.

III. ‘nice’ takes a command line as an argument.

1. $I, II$ only
2. $II, III$ only
3. $I, II, III$
4. $I, III$ only
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nice [OPTION] [COMMAND [ARG]...]