They made stone tablets to write stories and create something as shown in some artifacts, hieroglyphics, they Mayans created some historical infrastructures to represent their beliefs and worship. They created gods. They engage in civilization and organization that formed into a government.
Slavery was incredibly divisive because the Us was expanding into the west, and each new state had to decide whether it was going to be "slave" or "free", so there was no middle ground in terms of how the extension of slavery would unfold. This led to the Civil War.
Correct answer: C. The start of the Russian Revolution
Detail: The USA declared war in April, 1917. There was some revolution activity in Russian the spring of 1917, but the main "Russian Revolution" as led by the Bolsheviks started in October, 1917.
Context:
Public outrage in the US against the Germans swept the nation following the sinking of the British ocean liner, Lusitania -- but that happened before 1917. When a German U-boat (submarine) sank the Lusitania in May, 1915, over 1,000 persons were killed, including more than 100 Americans. The passenger liner was targeted by the Germans because they suspected weapons were being shipped to Britain in the cargo hold of the ship.
Germany managed to stave off American entry into the war at the time by pledging to stop submarine attacks. But a couple years later they resumed such attacks, and there was also an intercepted telegram (the "Zimmerman Telegram") that showed Germany was trying to secure Mexico as an ally against the United States.
In 1917, the US declared war on Germany in response.
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