What caused the Black Death (Bubonic Plague) to spread?

Which event in the history of the americans with disabilities act is an example of a conflict between different levels and branches of government?

Which factor contributed to the rise of african empires such as ghana and mali?

Lots of points: economics: the dollar value consists of all of the goods and services sold by of each of the following entities except: a. government b. consumers c. unemployed d. net exports