Which of the Following Stylised Facts About Economic Growth Is

Which of the following stylised facts about economic growth is not valid?

A) Economic growth has been a continuous process spanning the past 2000 years.
B) The gap in living standards among the industrialised countries has narrowed.
C) Economic growth has only been significant once countries have undergone an industrial revolution.
D) In general, the richer developed countries have grown at a slower rate than the less rich ones in recent years.