Firstly, The Berlin Wall was built as a symbol of the Cold War and to separate East and West Berlin. To prevent emigration from East Berlin into West Berlin or any other part of Germany.
The Fall of Berlin wall - It was torn down because East Berlin wanted yearned to be one free country with West Berlin. The destruction of the wall was celebrated all over the world.
The Wilmot Proviso failed to win the passage in the Senate. However, its introduction sparked a political firestorm that was never seen before since the Missouri debates that happened from 1819-1821. The Wilmot Proviso proposed an American law to ban slavery in places that were acquired from Mexico.
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B. Increased. Because after both of these events, Americans began to produce<span> their own goods.</span>