Which statement best characterizes the changes in real GDP per person and it's growth rate across countries?

1. Real GDP per person and the growth rate of real GDP per person vary widely across countries

2. Real GDP per person differs widely across countries but the growth rate of real GDP per person is similar across countries.

3. Real GDP per person and the growth rate of real GDP per person are similar across countries.

4. Real GDP per person is very similar across countries but the growth rate of real GDP per person differs widely across countries