Over the Long Sweep of Human History, Output Per Capita

Over the long sweep of human history, output per capita in the currently rich economies:

A) grew dramatically during the 20th century.
B) always grew at a positive rate.
C) has not grown much at all.
D) grew in the 1950s and 1960s at about the same rate as the previous thousand years.
E) grew dramatically during the 19th century.