The following countries remained the same: Spain, Portugal, Switzerland, United Kingdom of Great Britain and Ireland
The answer is C. The silk road was kind of slow, and people had heard of the incredible amount of wealth and riches in Asia as well as the luxurious spices, so people wanted easy access to trade for that stuff.
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It was a near total failure
The official investigations concluded that the bureau of Indian affairs attempts to induce native Indians to adopt white man culture to be futile and that it was a near total failure.