Most historians believe that the sumerian civilization declined due to a. the drying up of the tigris and euphrates rivers b. constant rebellion within the empire and invasion from outside c. extensive drought and the lack of rainfall over many years d. a devastating plague that killed thousands of sumer's citizens

Write a 150-word essay describing the effect of people's activities on the environment in the region.

Explain the value of statistics and other data to positive economics and to normative economics

Which of the following is an accurate description of the recent political history of the democratic republic of the congo? a. religious tensions have escalated into full-scale civil war a number of times since the belgians left the country in 1960. b. the political leader who gained power after the overthrow of a corrupt dictator was assassinated. c. the military leadership felt the country was stable enough, so they permitted democratic elections to take place. d. in 1990, a dictator seized and has held power ever since.