Answer:
LON was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. (Googled)
The founder of LON was Woodrow Wilson.
It was founded in January 10, 1920 but ceased in April 20, 1946.
"The Council was a coalition of the four permanent members: France, Italy, Japan, and the United Kingdom. Germany joined in 1926, but left in 1935. In September 1934, the Soviet Union entered the League of Nations.
Member: Peru; Colombia; Turkey; Soviet Union" (Googled)
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Answer:
The opal is the National Gemstone of Australia. The opal is almost exclusively located within Cretaceous sedimentary rocks of the Great Artesian Basin, Intense weathering resulted in extensive silicification at relatively shallow levels within the Tertiary regolith.
D. The Bessemer Process, which made steel better, and quicker
The Truman Doctrine was created by then-President Harry S. Truman in 1947. The purpose of the doctrine was to counter Soviet expansion into Europe during the Cold War.
Scott was an enslaved person who was sued for his freedom because his owner died so the answer is A