What is the main purpose of MLK’s “Letter from a Birmingham Jail”? To inform the people that anyone who lives inside the United States can never be considered an outsider in its bounds.

To persuade his listeners that the most important step in his campaign is the collection of facts to determine whether injustice exists.

To persuade those who criticize him that he is justified in his non-violent campaign.

To inform his readers about the brutality taking place in Birmingham.