D. A conversation with Arthur Radley to set the record straight.
Explanation:
There was a shy and reclusive neighbor whose name was Arthur Radley also known as Boo, whom the children picked an interest in and wanted to bring out of his shell during summer. Arthur Radley later proved helpful to the children after he killed Bob Ewell who wanted to kill Scout and Jem.
Atticus, the children's father was defending a black man known as Tom Robinson, and this sparked the hatred of Bob Ewell who wanted to harm the family.
