Answer:
The answer is when the source information is written in a particularly brilliant or witty way.
Step-by-step explanation:
The word source refers to a book, article, website, chapter of a book, or any other media that supplies information about something else, in this case, The Raven, a poem by American writer Edgar Allan Poe. Franny should quote directly if the source information is written in a particularly brilliant or witty way, because it means the it is most likely the best way to express the idea. Also, if she didn't quote, she could be plagiarizing.