A Positive Economic Change from 1960 to 2018 Was Seen

A positive economic change from 1960 to 2018 was seen in the

A) growth of the centrally planned economies of the communist world.
B) U.S. position in the world economy and world trade picture.
C) share of world output enjoyed by rich industrialized countries such as Great Britain, Germany, and France.
D) share of world output accounted for by developing nations.
E) prevalence of independent and self-contained national economies.