Which of the following contributed to an increase in world population in the 20th century?

Improved medicine and sanitation
An increase in food production
Disease
An increase in the average life expectancy

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

In an economic downturn, what can happen in countries that depend on high taxes to fund social programs?

Which is another term for the enterprise system?