Why was there a significant drop in the population of American Indians from an estimated 60 million in 1491, to 200,000 in 1910?

Explanation:

Estimated Bison Population ... An estimated 30 to 60 million bison living in North America. ... moving westward from the east coast, they brought changes to native habitat ... Mass destruction of the once great herds of bison began. ... Native Americans market hunters concentrated on cow bison, because of their prime hides ...

the correct answer that would best complete the given statement above would be option b. expanding civil services. diocletian and constantine paved the way for foreign invasion by dividing the empire, creating administrative bureaucracies and reorganizing the military, except for expanding civil services. hope this answer .

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explanation: