The correct answer is C) Native Americans and coal miners.
The search terms that would BEST help you find the source written by LizBeth Stanley are "Native Americans and coal miners."
That is why it is so important to write the correct citation when doing research. In this case, we are referring to the works of LizBeth Stanley, specifically, her book called "How Native Americans Were Affected by the Hunt for Coal." So the correct citation should be Stanley, LizBeth. How Native Americans Were Affected by the Hunt for Coal. New York: Bantam, 2009.