The opening sentence that best goes with the details above is B It allows the reader to better understand their favorite characters and to learn why they act the way they act.
The excerpt above talks about how people like to find out the background of their favorite characters.
This background would help explain why the character acts the way they do and offers more insight into them.
In conclusion, option B is correct.
Find out more on the characterization at https://brainly.com/question/1393329.