Answer:
In addition to their influence with contemporaneous Mesoamerican cultures, as the first civilization in Mesoamerica, the Olmecs are credited, or speculatively credited, with many "firsts", including the bloodletting and perhaps human sacrifice, writing and epigraphy, and the invention of popcorn, zero and the
Explanation:
Mein Kampf is an important work or document in history because it clearly outlines the roots of Adolf Hitler's ideology prior to his rise to power in Germany. Written while he was in prison, Hitler chronicled his life and also his future political plans for Germany which were based on racist, oppressive, and fascist principles. The book shows the roots of Nazism and the ideas of Hitler that later led to the Holocaust and World War II.
The United States was the last to join the Allied Powers because they did not want to be apart of the war. They joined the Allied Powers after Japan bombed Pearl Harbor.
Harriet Tubman because she was strong and lead slaves to freedom.
The opposite sum of a number refers to the fact that the opposite of a sum of real numbers is equal to the sum of the opposite. Base on that, the answer would be letter D. -(-17+5) = 17+(-5). I hope you are satisfied with my answer and feel free to ask for more