Technically he could be considered to be a freedman, because Illinois outlawed slavery. However, the Supreme Court ruled that his time spent in Illinois didn't change the fact that he remained a slave after his master died, so he was not empancipated, and thus was still a slave.
The answer is D: He was a slave.
<span>Britain led the world's Industrial Revolution with its early commitment to coal mining, steam power, textile, mills, machinery, railways, and shipbuilding. Britain's demand for iron and steel, combined with ample capital and energetic entrepreneurs, made it the world's leader in the first half of 19th century.</span><span>
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I do believe that, after research, it is C, Coltan.
Correct me if I am wrong, but do have a good day!