The correct answer is: C. Either I or II is implicit
The statement “Do not copy our software without our permission” implies that it is possible to copy the software. This is because the statement would not be necessary if it were not possible to copy the software. The statement also implies that the company believes that warning people not to copy the software will have some effect. This is because the company would not bother to issue the warning if they did not believe that it would have any effect.
However, the statement does not explicitly state either of these assumptions. Therefore, we can only say that either assumption I or assumption II is implicit in the statement.