Final answer:
The Cherokee were forced to leave Georgia due to White settlers' desire for land, particularly after the Georgia Gold Rush, not because of the reasons listed in the options (A, B, C). They had made efforts to assimilate, but these were ultimately disregarded in the face of economic and geopolitical motives, leading to the Trail of Tears.
Step-by-step explanation:
The Cherokee were forced to leave Georgia not because of a lack of treaty with the United States, their refusal to be Christianized, or their resistance to becoming 'western' white Americans. Instead, the main reasons for the forced relocation, known as the Trail of Tears, were the discovery of gold on their land which led to the Georgia Gold Rush, the desire of White Georgians for the Cherokee's fertile agricultural lands, and a series of geopolitical actions by the state of Georgia and the federal government, including the Indian Removal Act and the non-binding Treaty of New Echota, signed by a minority faction within the Cherokee Nation without the authority of the principal chief John Ross and the majority of the Cherokee people.
The Cherokee had in fact made significant efforts to adopt White American culture, including developing a written constitution, establishing a newspaper called the Cherokee Phoenix, embracing Christianity, and adhering to a Euro-American lifestyle. However, these efforts did not protect them from removal, which was largely driven by White settlers' desire for land and the economic opportunities it provided, such as internal improvements and land development. The relocation forced by President Martin Van Buren and the U.S. military resulted in thousands of Cherokee deaths and a legacy of injustice.