Not sure about this, but my best guess would be the MH370 where it crashed somewhere in the Indian Ocean.
Answer:
Option: They wanted to seek silver and gold there.
Explanation:
Americans first travel across the Great Plains to get gold and silver in the 1800s. After the Civil War, a vast amount of people from the east began to move in the West in search of gold. The first wave of settlers to the West were miners. The great plains region consists of Texas, Colorado, Kansas, Nebraska, and Oklahoma.
They wrote a new constitution.
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C. At least 35
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