I think it is c because abrasive can be to scrape and abound can be to exist in great quantities or numbers.
Where is the text? We need context
Most soldiers came from the middle and lower classes, and Americans wanted to know more about them.With the onset of industrial and scientific advances, Americans no longer believed in the supernatural.With all of the death and destruction from the war, Americans wanted to escape into an ideal world.Despite the industrial and scientific advances, Americans still believed in the supernatural.
The answer is that all men are created equal, endowed with certain fundamental rights, that among these are life, liberty and the pursuit of happiness.