I need the rest of the question this is a statement
They created the number system and discovered that the earth was round by studying eclipses.
Hope this helps.
William McKinley was the 25th President of the United States, serving from March 4, 1897, until his assassination on September 14, 1901, after leading the nation to victory in the Spanish-American War and raising protective tariffs to promote American industry.
Since nomadic means to always travel (go to place to place)
A is the answer
The United Nations Organization was born in 1945 after a long process of many states charting how its existence should be. As of this moment, it is composed of 193 member states and 2 observer states.
The UNO's role is to encourage and to press for the progress of peace and rights in the world. It does that through treaties and covenants that are signed and then ratified by interested countries. After this process, groups inside each country can count on these documents to press their governments to act on the treaties signed.
One of many possible indicators of its importance is the number of countries that ratified the International Covenant on Civil and Political Rights (1966): 173. Once a country ratifies a Covenant it compromises to enforce it as policy in its territory.