Consider the following graph created be Heston and others. It shows per capita GDP growth rates of various countries (1960-2010) on the vertical axis and 1960 per capita GDP (in dollars) of those countries on the horizontal axis. The 1960 GDP numbers show the "initial" GDP conditions in these countries. Based on this graph, we can conclude that:

(See Attached Graph)

Select one:

a. lower income countries consistently grew faster than higher income countries.

b. the average income of lower income countries eventually will catch up with developed country levels.

c. no tendency that lower income countries are growing faster than higher income countries.

d. the growth rates of many lower income countries are similar