Which, if any, of the following statements are correct:

1) The combination of an expansionary fiscal and monetary policy aims at decreasing the level of prices.

2) The combination of an expansionary monetary policy and a contractionary fiscal policy leads to an increase in the interest rates and a decrease in investment; however, the effect on AD is undefined.

3) A government may adopt an expansionary monetary policy without changing the nominal interest rates.

4)None of the other possible answers.