The correct answer is B. Human Development Index.
The Human Development Index (HDI) takes into consideration several different factors in order to categorize nations as to levels of development. Some of the factors they use are:
A) A country's Gross National Income (GNI)
B) Life expectancy
C) Education of citizens (i.e. college degree, years of schooling for average citizen).
I believe that there are two; the Blue Nile that runs through Ethiopia and the White Nile which runs through Tanzania!
The reason why the spread of the potato is so important to us is that it revolutionised the world's food supply. There was suddenly enough food to feed everyone on our planet. It took one year for the potato to get from London to the south of France. The potato left London in 1599 and arrived in the south of France in 1600. The potato also took one year to get from Madrid to Rome. The potato left Madrid in 1565 and arrived in Rome in 1566.
In dOnT know tbh but u can ask s O m e one else e o k
Containment is a U.S. policy that tries to stop the spread of Communism by "containing" it to the areas that it has already spread to. This policy was used after WWll and just before Cold War tensions started to heat up between the U.S. and the Soviet Union because America wanted to stop Communist Russia's influence on the rest of Europe.