In general the Byzantine Empire was monotheistic instead of polytheistic since it was accepted that people would worship only one god as opposed to many. However given the vast nature of the empire it was inevitable that some people would by polytheistic.
By expanding government control over the economy
Answer:1-infectious Eurasian diseases
2-attempts of assimilation (and Manifest Destiny)
3-relocation attempt (Indian Removal Act of 1830)
4-diminished food supply for nomadic tribes
5-the introduction of horses and other animals to the new world (through the Columbian Exchange)
Answer:
False, you need to research for security reasons