The correct answer is "A".
The Domino Theory was developed in 1950 in the US administration. It proposed the idea that if one country in a region was governed by a left-wing power which shared communist beliefs, neighbor countries will follow suit. This led the United States to get involved in numerous armed conflicts around the world, such as the Korean War, in order to prevent the spread of Communism.
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League of Nations.
It fell apart because it failed to stop WWII (partially because the US didn't join it), and after WWII, the United Nations was created.
US Troops were killed during a conflict.
In the year 1993, the Somalian capital of Mogadishu was raided by American troops.
President Bush had sent the United States forces to go on a mission to provide food to the people of Somalia who were suffering from the civil war.
Thousands of Somalia civilians were starving so the President Bush sent the American on a humanitarian mission.
During a battle two United Nations soldiers and American 18 Americans lost their lives.
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