It should be 1929 - 1932 because that's when it dropped the most. All of the other choices have sections where it rises back up.
Answer:
they contributed to future conflicts by failing to resolve important issues
Explanation:
The end of WWI and consequently the end of WWII were not enough to end the political and ideological disputes between nations. Europe for the first time was not the strongest Imperialist empire as it was in the past, and two different nations rise to power: The U.S. and the Soviet Union, with different ideological views about society. Because of this, we had different emerging conflicts such as the Korean War, the Vietnam war, and so many others.
2nd one because those were the areas with the best water to grow the planbts.
