Answer:
O will increase and output and price level will increase as well.
Explanation:
If workers are more educated, the productivity of the country will increase, increasing total output. As investment in training increases, so thus the workers' capacity to perform more efficiently. Also, when the demand for better (or more) trained workers increases, the salary level will also increase. As workers gain training and/or experience, their salaries increase, e.g. on average, a person with a college degree earns much more than someone with just a high school degree. This increase in the level of salaries will lead to an increase in the general price level.