Considering the available options, the US Government tried to change Native American culture through option B. "1 and 2."
This is evident in the fact that the United States government used the policy of allotment and assimilation to tired to change the Native American culture.
To do that, the United States government divided their tribal land up into individual territories through the Allotment policy and then sent their children to English-speaking boarding schools through the policy of Assimilation.
Hence, in this case, it is concluded that the correct answer is option B. "1 and 2."
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