Read this excerpt from We’ve Got a Job: The 1963 Children’s March. [The Peace Ponies] soon figured out what they could do. In addition to attending the weekday mass meetings, they would participate in Saturday-morning training sessions where young activists were taught the two fundamental precepts of the civil rights movement. The first of these consisted of using "direct action" strategies to confront injustice, such as picketing stores targeted by the Selective Buying Campaign and holding sit-ins at segregated lunch counters. The other related precept was nonviolence – that is, carrying out these actions quietly and respectfully without resorting to violence, regardless of how white people, including the police, reacted.

How does the author use third-person narration in this excerpt?

to describe the progress of the civil rights movement
to detail the careful preparation of young activists
to reveal the economic results of boycotts
to explain strategies for ending police violence