I believe the answer is to convince readers to join a cause
The answer here is C: it allows the reader to get to know each character.
Answer: B
Explanation: B because if you can't prove your information then your expository essay wasn't ivestigated deeply enoulgh and needs to be revised if you want a better grade.
It opens peoples eyes in a way.it changes the way people see things from a different perspective because your opening up different options and possibilities to that issue or discussion.it will make you think about both sides of each social issue or political issue.