Read this sentence from neil degrasse tyson's preface to his book the pluto files: gathered here in one place is a record of pluto's rise and fall from planethood, given by way of media accounts, public forums, cartoons, and letters i received from disgruntled schoolchildren, their teachers, strongly opinionated adults, and colleagues. why would this be considered an example of expository writing? a. it argues that pluto should not be considered a planet. b. it fictionalizes the story of pluto's history. c. it gives an opinion of tyson's book about pluto. d. it informs the reader about pluto's planetary status