Citizens of developing nations commonly experience
a.
high rates of literacy
b.
long life expectancies
c.
access to safe drinking water
d.
waterborne endemic diseases

D.  waterborne endemic diseases

Explanation:

Most of the countries in the world are underdeveloped. They are home to around 84% of the world's population, but only represent 19% of the world's GDP. The majority are found on the continents of Africa and Asia.

The differences between underdeveloped and developed countries can be abysmal. For example, on average a person in the United States produces 10 times more wealth per year than a Bolivian. In addition to having a better quality of life, better education, etc. More: economic activity Bolivia.

Definition of underdeveloped countries: a country characterized by massive chronic poverty, which is not a consequence of a temporary misfortune, but by obsolete methods of production and social organization. That is, poverty is not due to the lack of natural resources and therefore could be reduced by methods applied in the countries that are now developed.

hello there, can you add the "following" multiple choices

i would say it is the roman empire europe after the norman conquest.