In Macroland,a Country That Operates According to Okun's Law,potential GDP

In Macroland,a country that operates according to Okun's law,potential GDP equals $10 trillion,actual GDP is $9.6 trillion,and the natural rate of unemployment is 6%.What is the actual rate of unemployment in Macroland?

A) 4%.
B) 5%.
C) 6%.
D) 7%.
E) 8%.