Depending on what you mean, it changed when the north saw that slavery was not just, and started goin on the attack on it. Which lead to the whole civil war of confederates vs the union
Answer:
B. a plan for rebuilding Europe after WWII
Explanation:
The Marshall Plan was an American initiative passed in 1948 for foreign aid to Western Europe. The United States transferred over $12 billion in economic recovery programs to Western European economies after the end of World War II. They used this plan as a way to rebuild Europe.
Congress was completely ineffective in preventing the Civil War because the Southern states still seceded. This option is best drawn because of the fact that that in the case of the 2nd option, they did not delay the war in any way. It was only a matter of time until the war happened, and nothing could have stopped it from happening. Once the Southern states made the decision to secede, the war was inevitable.
