A. However is my best guess none of the other choices seem to fit in very well. Good luck :)
Pneumonoultramicroscopicsilicovolcanoconiosis: "A <span>lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano; medically, it is the same as silicosis."
Hope this helps~!
~{Dunsforhands}</span>
The answer to your question is "A", as it best illustrates a mental image of the difficulties slaves faced.