Multiple choice 8 pointer and mark brainiest for correct

what is a key difference between a theme and a central idea?

a. a central idea is a complete thought, while a theme is only a partial thought.
b. a central idea is usually found in literary nonfiction, while a theme is usually found in fiction.
c. a central idea is specific to a genre, such as epic poetry, while a theme is specific to a medium, such as written text.
d. a central idea requires interpretation, while a theme is stated directly as a moral.