Answer: to reveal the challenges of social activism
This is the most accurate answer. In this excerpt, the author does not describe a routine action. The event was an anomaly in the lives of African Americans. The author also does not talk about the actions of police forces, as the father gave in without the intervention of the police. Finally, the author does not actually describe the pride the author feels for her father. What the excerpt shows is the challenges of social activism, and the judgement that activists faced when trying to do the right thing.