D. that germs cause disease. He was the person who discovered the process of pasteurization.
Answer:
Austro-German Alliance, also called Dual Alliance, (1879) pact between Austria-Hungary and the German Empire in which the two powers promised each other support in case of attack by Russia, and neutrality in case of aggression by any other power.
As he was writing the poem, he symbolized the rivers he went to with the history and legacy of the Negro. Euphrates River represents the dawn of civilization, Congo -the region where the largest number of blacks were sold as slaves, Nile - importance of the ancient African civilizations, Mississippi - slavery and freedom.
All these mentioned rivers are significant in the history of the African Americans
