Answer:
to detail the careful preparation of young activists
Step-by-step explanation:
The author of the above excerpt used the third-person, 'they', to describe how young people planned to protest the injustice they were facing in their society but in a peaceful way. They first joined in the Saturday-morning sessions in church where they were taught the ropes of a peaceful protest.
Some of the strategies they learned were sit-ins at lunch counters, and boycotting stores that segregated. However, they were to do all of these in a peaceful manner.