The rules change depending on the type of work. For long ones, you better you <em>Italic, </em>such as books, movies, albums, and others. For shorter parts of works or shorter works, you put the title between quotation marks, such as: poems, chapters, songs, and so on.
That's why the correct answer is:
C. Poe’s poem “The Raven” is found in the book Poe’s Collected Works.