Which of These Does NOT Describe the Natural Rate of Unemployment

Multiple Choice

Which of these does NOT describe the natural rate of unemployment?

A) the point at which the rates of change in productivity and wages are equal
B) the unemployment rate that exerts inflationary pressures
C) the unemployment rate at which inflation equals expected inflation, resulting in zero price pressures on the economy
D) the point at which the rates of change in productivity and wages are equal and the unemployment rate exerts no inflationary pressures