The Natural Unemployment Rate

The natural unemployment rate

A) has been estimated to range between 4 per cent and 6 per cent in Australia in recent years.
B) occurs when 100 per cent of the labour force is employed.
C) is attained whenever the unemployment rate is less than 5 per cent, because 95 per cent employment is considered full employment.
D) is estimated to be close to 9 per cent in recent years in Australia.