The Following Graph Shows: No Systematic Tendency for Poorer Countries

The following graph shows: No Systematic Tendency for Poorer Countries to "Catch Up"
Source: Heston,et al.(2012) .

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