The Kansas-Nebraska Act<span> was passed by the U.S. Congress on May 30, 1854. It allowed people in the territories of </span>Kansas<span> and</span>Nebraska<span> to decide for themselves whether or not to allow slavery within their borders. The </span>Act<span> served to repeal the Missouri Compromise of 1820 which prohibited slavery north of latitude 36°30´.</span>
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The Space Race was considered important because it showed the world which country had the best science, technology, and economic system. After World War II both the United States and the Soviet Union realized how important rocket research would be to the military.
You didn't really provide any options here but we can safely say that Alexander's army (if you're talking about the army of Alexander the Great) was alert because they were trespassing in foreign terain where they could be attacked at any time.
Martin Luther was a monk, they sold indulgences and preached incorrectly, he made the 95 thesis, he printed the Bible in German so people other than just the priests could read it
