It was the Mayans who built an ancient civilization, in what is now Mexico and Central America. They had an incredibly advanced civilization but were overcome by European settlers.
B. It was to aid Europe after WWII
<span>The Asiatic Huns were also known as the Xiongnu.</span>
It's a close run between all of the above and C. If I would have to choose, I'd say C, since executing ALL the Spanish seems a bit extreme.<span />