Sharply increasing the interest rate on student loans to people pursuing advanced degrees in printing.

Consider a small island country whose only industry is printing.Imagine you’re in charge of establishing economic policy for the small island country.
Which of the following policies would lead to greater productivity in the printing industry?Check all that apply.
1. Offering free public education to every worker in the country2. Investing in combatting malnutrition and promoting nutrition in the labour fource3. Imposing a tax on printing presses4. Sharply increasing the interest rate on student loans to people pursuing advanced degrees in printing.