Answer :
The reformers who promoted assimilation had the goals to teach American Indians English and to convert them to Christianity. Hence, option D is correct.
What is assimilation?
Assimilation refers to as the mixing of cultures and ethnicities into a dominant group of culture in such a way that the minority group that gets assimilated also adapts to the beliefs and traditions of the dominant group.
Many American and western reformers during the 19th and 20th century, had tried to spread the beliefs of Christianity by assimilation of Native Indians into American white ethnicity.
Hence, option D holds true regarding assimilation.
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