Which piece of writing is the best example of literary nonfiction?

a. a straightforward, factual biography of abraham lincoln
b. a mockery of a popular tv show, movie, or novel
c. a story about animals that teaches a moral lesson
d. an account of one's childhood that includes dialogue

The answer is D: An account of one's childhood that includes dialogue.

Literary nonfiction is a text that holds the same requirements as nonfiction: it must be factually correct and its creator can be held responsible for its accuracy. How literary nonfiction differs from nonfiction is that, in it, it is permitted to make use of different literary styles and techniques to create an entertaining and captivating narrative —like, for example, the use of dialogues in scenes that were not recorded in any way, except perhaps as a memory. These latter characteristics, not without controversy, point to the polemical difference between fact and fiction.

the answer is decimated

the correct answer would be:  

a. adverb phrase