In order to stabilize unemployment rates and GDP, the most effective measures of the ones proposed is the following:
If the national market cannot boost demand and production, is a good idea to search for customers of national products abroad. If the country can increase exports, therefore production in the country will be enhanced, more people will be employed and earn wages that can use to consume. Therefore national purchasing powers and demand will be bosted too and consumption and investment levels will increase. The increases in consumption, investment and exports will in turn, increase the GDP figures.
Increasing the money supply would also lead to a boost in demand, but at the cost of creating price uncertainty and elevating the inflation levels. If this measure is used, by trying to solve a problem you are creating an even worse one.
The other options make no sense. Decreasing production decreases GDP even further and establishing controls on wages reduces employment.