This should answer your question 
https://www.enotes.com/homework-help/according-bacon-what-three-main-benefits-study-464405
 
        
             
        
        
        
Answer:
<h3>When they understood and learned more about the lives of Calpurnia, Boo Radley and Tom Robinson.</h3>
Explanation:
- Scout and Jem began to see life from other people's perspective when they understood and learned more about the lives of Calpurnia, Boo Radley and Tom Robinson.
- At first, they thought that they were forced to listen to Calpurnia and felt that she was tyrannical. But once they realized how life was hard for Calpurnia, they soon understood the efforts made by Calpurnia to survive as an Africa-American was not easy.
- Secondly, Scout and Jem realized that Boo was not as bad as they thought to be. They realized that they were wrong in their judgement and that Boo Radley was, in fact, a good person.
- And finally when Scout understood what life was like for Tom Robinson, Scout realized that the society where she lived was corrupted and evil. After learning more about the lives of Calpurnia, Boo Radley and Tom Robinson, Scout and Jem become more mature and understanding than they were before.
 
        
             
        
        
        
In understanding the central idea or the main idea of a particular passage. You must take out the hard terms and look for their meanings. It is one way of understanding at the same time learning with the passage. It is also advisable to stay focus on what you are reading to easily understand it.
        
             
        
        
        
I think it's D. primary source.... not 100% sure