The correct answer is: C. Either I or II is implicit
The statement “The economic prosperity of any nation is dependent on the quality of its human resources” does not explicitly state that it is possible to measure the quality of human resources, nor does it explicitly state that achieving economic prosperity is a cherished goal of every nation. However, both of these assumptions are necessary in order for the statement to be true.
If it is not possible to measure the quality of human resources, then it is impossible to know whether or not a nation’s economic prosperity is dependent on it. Similarly, if achieving economic prosperity is not a cherished goal of every nation, then it is possible that a nation’s economic prosperity is not dependent on the quality of its human resources.
Therefore, either assumption I or assumption II must be true in order for the statement to be true.