Answer:A. Preamble
Explanation:
We the people starts the preamble
U-boats were military submarines used by the Germans. While they were useful against warships, U-boats were the most effective in economic warfare by blockading coasts so resources could not be shipped to Germany's allies. WWI was the first major war that employed submarines in warfare.
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Answer:
C. Its effects stopped all advancements in science and medicine for the next two centuries.
Explanation:
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<span>Andrew Jackson felt betrayed by his loss in 1824 and wanted to create a political party that was not run by “aristocrats.”</span><span>
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