Which was a scientific goal of the Corps of Discovery? O to establish an American presence in the West
O to study the area's plant and animal life
to set up trading posts and forts
to keep Europeans out of the region
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the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

answer: an oligarchy is a political system in which the government is run by a group of noble families, or the elite wealthy members of a society. a present day oligarchic government is iran.

explanation:

if i am correct the answer is going to be a) the federal program of reconstruction ended.