Which is an example of something that might appear as an epigraph in a story? A. a table of contents. B. an index entry that refers to page 4. C. a prologue that gives context. D. a line of poetry by T. S. Eliot.

hm, switch the relative; nominative and indefinite; objective ? not too bright in the knowledge of the english.

sentence lenght varies according to word choice.you select which word to use and that will require to use other expressions that collocate with the word chosen.sentence length will vary   according to the choice of words you make to express your ideas.  

the answer is #2 if im not mistaken