Frederick Douglass said that "Once you learn to read, you will be forever free." Douglass felt that his pathway to freedom was literacy.
Atticus knows he probably won't win but he does this anyways to uphold his sense of self-respect and justice
it isnt usual for white lawyers to do their best for 2 reasons i believe:
1) black people are usually convicted so its almost possible to defend them even if they are innocent
2) like a lot of people there were also some racist lawyers
The dependent clause is between the subject ('The man') and the main verb ('was selling'). Hope this helps! I believe the answer is adjective option B