The main purpose of expository text is to inform or describe what the story or book is about, so when the student reads they are understanding what is being read better. They can use this technique forever when reading and comprehening.
Tom Buchanan is with them
I'd say C the quest
the theme is important too, but then it all depends on the quest.....
Hope I helped !!
You can take home your food for left overs or you can just order less.