A. author
Both "The Caged Bird" and "I Know Why the Caged Bird Sings" share the same author, Maya Angelou. "I Know Why the Caged Bird Sings" is her autobiography, detailing her early years, while "The Caged Bird" refers to a symbol used in her work, representing the struggle for freedom. The works share thematic elements and may reference similar characters and settings, but the key commonality is the author, Maya Angelou.