Final answer:
Scout's experience with casual racial language illustrating ingrained racial attitudes represents irony, a contrast between expectations and reality.
Step-by-step explanation:
The question refers to the character Scout from the novel To Kill a Mockingbird and her experience with casual racial language that reflects the ingrained racial attitudes of her society. The correct answer is C) Irony. Irony is a literary device that occurs when there is a contrast between what is expected and what actually happens. In the case of Scout, it is ironic that although she is just a child, she has already been exposed to racial attitudes that she passively incorporates into her thinking, demonstrating how deeply racism is ingrained in her community.