Answer: A. Germanic tribes
Explanation: The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders.
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The answer is C) all of these groups existed in the colonies.
Iroquois Six Nations Land Cessions to Pennsylvania, 1736-1792. Between 1736 and 1792, the Iroquois League, formed of the Seneca, Oneida, Mohawk, Cayuga, Tuscarora, and Onondaga tribes, made several important land deals with American colonists, often without the consent of those tribes who occupied the land.