Answer:
d is correct option in the given question
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The reason why the emancipation proclamation was important was because: it freed all the enslaved people in the united states.
<h3>Whaty was President Lincoln's emancipation proclamation?</h3>
This was the insistence by President Lincoln that the American civil war was a war for the enslaved to have their freedom.
The civil war was because the South had disagreed to the freedom of the enslaved blacks in the country.
Read more on President Lincoln here: brainly.com/question/7955162
B - Slave revolts.
The revolt of Spartacus, which was also the most famous slave uprising in the history of the Roman Empire, lead to questions about the usefulness and effectiveness of the current governmental system in Rome. This, along with other factors, made them plunge into a crisis which ended through the transition to an empire.
The answer to the question is B