The natural rate of unemployment in a country is 4 percent. This...

The natural rate of unemployment in a country is 4 percent. This implies that:

• the country has a 4 percent unemployment rate when the labor market is in equilibrium. 

• the unemployment rate is constant at 4 percent over time.

• the country has an unemployment rate of 4 percent in the short run.

• 4 percent of the labor force is unemployed at any given point of time

which one