I think the answer would be a claim or thesis. Claim because you are saying your opinion or it is the part of the argument that you claim. Thesis because it is basically your claim by stating what it is.
The Nullification Crisis of 1832 centered around d) southern opposition to tariffs. "The Nullification Crisis was a sectional crisis in 1832-33, during the presidency of Andrew Jackson, which involved a confrontation between South Carolina and the federal government. The crisis ensued after South Carolina declared that the federal Tariffs of 1828 and 1832 were unconstitutional and therefore null and void within the sovereign boundaries of the state."
Answer:
"Through the late 1920s and early 1930s, the Nazis gathered enough electoral support to become the largest political party in the Reichstag, and Hitler's blend of political acuity, deceptiveness, and cunning converted the party's non-majority but plurality status into effective governing power in the ailing Weimar Republic of 1933."
Explanation:
Overall, its literally just because he got enough support
Nuclear weapons technology was developed during the Cold War, which makes it possible to launch missiles across vast distances and wage wars that create exponentially more damage than before.
-Rise of Italian City States/Civic Pride - Cities want to look better than one another, a middle class davelops due to merchants making large sums of money
-New interest/need for new learning and technology
Hope this Helps ;)