Answer: 21 years
Explanation:
I am pretty sure that, that is the best answer.
They were first dug in 1914.
Explanation:
As stated on AIM's official website, the American Indian Movement's goals were: the recognition of Indian treaties by the United States government, among other goals such as sovereignty and the protection of Native Americans and their liberties.
Answer:
The agricultural revolution in the 18th century, Favorable financial institutions, advances in transportation, a ready supply of mineral resources, and a vast colonial market.
Explanation: