Acommon trait shared by developing nations is that they
a. were once colonized by other nations
b. have a lower birthrate than developed nations
c. have political stability but a lack of economic funds
d. where once soviet bloc nations under communism

A common trait shared by developing nations is that they a) were once colonized by other nations. A common factor among developing countries is that for the most part they were colonized by what was seen at the time as a "European superpower", however what developing countries have more in common is that they have an underdeveloped industrial base and a low human development index compared to other countries. The human development index includes looking at life expectancy, education and per capita income.