The correct answer is: B. None is strong
Argument I is not strong because it is based on the assumption that the present management theory is always correct. This is not necessarily the case, as there are many different management theories that have been successful.
Argument II is not strong because it is based on the assumption that all workers are illiterate. This is not true, as there are many workers who are literate and have the skills and knowledge necessary to participate in management.
Argument III is not strong because it is based on the assumption that employee-owned companies always have higher productivity. This is not necessarily the case, as there are many factors that can affect productivity, such as the quality of management, the level of employee morale, and the availability of resources.
Argument IV is not strong because it is based on the assumption that employee-union ownership always drives up salaries and wages. This is not necessarily the case, as there are many factors that can affect salaries and wages, such as the level of demand for labor, the level of supply of labor, and the bargaining power of unions.
In conclusion, none of the arguments are strong because they are all based on assumptions that are not necessarily true.