After the Agricultural Revolution was done, the factor that most likely led early Indigenous peoples to form more complex societies was D. The adoption of farming techniques that allowed people to settle in one place.
<h3>How did the Agricultural Revolution lead to more complex societies?</h3>
Thanks to the Agricultural Revolution, people were able to produce enough food to feed larger groups of people and still have enough surplus that they didn't have to rely on things like hunting animals and gathering seeds and other food. 
This meant that people no longer needed to migrate to get food and could settle down in one area. Once they did this, they founded societies. These societies needed laws and other things to ensure the peace and complex societies were then born. 
Find out more on the impacts of the Agricultural Revolution at brainly.com/question/10198345
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Answer:
<em><u>Concert of Europe</u></em>
Explanation:
The group of European countries that agreed on policies and  formed alliances between 1814 and 1914 to maintain balance of power in Europe and stop the spread of revolutions were known as Concert of Europe.  Its member countries were Austria, United Kingdom, France, France, Italy and Prussia.
 It was also known as Congress system because the leaders used to meet and make decisions by mutual agreement. The concert of Europe was founded by United Kingdom, Russia, Prussia and Austria. These members defeated Napoleon and led to the collapse of first french empire. It lasted in two phases the first from 1815 to 1860's and the second phase from 1880's to 1914. 
 
        
             
        
        
        
Answer:
Wilson was a college professor, university president and Democratic governor of New Jersey before winning the White House in 1912. Once in office, he pursued an ambitious agenda of progressive reform that included the establishment of the Federal Reserve and Federal Trade Commission.
Explanation:
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C. They were brought as slaves