It increased because of the industrial era<span />
An appalling of black codes and other racist laws/acts as well as adding the 14th amendment which gave African Americans a vote.
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Based on the order of occurrence, the government used by rome during its history is :
1. Monarchy ( 753 - 509 BC)
2. Republic (509 - 27 BC)
3. Oligarchy (27 BC - 476 AD)
4. Dictatorship
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Operation Barbarossa was the Nazi German military invasion of the "USSR", since this was the famous surprise attack by Germany that broke the Nazi-Soviet Pact in World War II.
Answer is A, the spread of Sanskrit language