According to the United Nations' Stages of Economic Development for Classifying

According to the United Nations' stages of economic development for classifying countries with respect to levels of industrialization, a country that is industrially underdeveloped, agrarian, has subsistence society with rural populations and extremely low per capita income levels falls under the category of _____.

A) first world countries
B) least-developed countries
C) less-developed countries
D) newly industrialized countries
E) big emerging markets