I would say c but check with your book jus in case
20 million deaths total, about 10 million military and almost 10 million civilian.
It has been argued that the first Census<span> was prompted by the publication of a book called Essay on the Principle of Population, which was written by Thomas Malthus in 1798. ... Using the </span>Census<span> to collect information for use in developing government policy has continued to this day.</span>
The invention of the cotton gin.
The US Army is the answer