"First World" Was a Term Coined After World War II

"First World" was a term coined after World War II which referred to:

A) the unknown nations (cultural entities) of indigenous peoples living within or across national state boundaries.
B) the states that aligned with neither the democratic-industrial countries nor with the communist-socialist states.
C) the Eastern bloc of the communist-socialist states.
D) the bloc of democratic-industrial countries within the American influence sphere.
E) the bloc of nations that had been colonial powers and wielded significant economic and political power.