Answer:
The author's use of Wash's quotes helps readers understand:
D. that Wash had terrible experiences dealing with the police.
Step-by-step explanation:
Washington Booker, aka Wash, was one of the thousands who protested in 1963 Children's March against segregation in Alabama.
From the excerpt, we can infer that Wash had had awful experiences with the police. One of his quotes used by the author is "the police was vicious murderers." Wash knew the police would hurt African Americans. In cities where segregation was the norm, police violence against black people was even worse. No wonder Wash was surprised to see people turning themselves over to the police. From his own experiences, he knew for a fact there was high chance of them being hurt.