Final answer:
The best example of a complicating incident in Frederick Douglass's life is when his mistress refuses to continue his education.
Step-by-step explanation:
The best example of a complicating incident in Frederick Douglass's life is when his mistress refuses to continue his education.
In his autobiography, Narrative of the Life of Frederick Douglass, Douglass describes how his mistress, Mrs. Auld, initially teaches him to read and write. However, after her husband forbids her from educating him further, Mrs. Auld stops teaching him. This complicating incident presents a significant obstacle to Douglass's pursuit of education and freedom.