Emily Dickinson's poems typically include theme and tone as well as style and form , meter and rhyme punctuation and syntax , and diction. :)
Well, which one is "external?" Headaches and stomachaches are known to exist internally, isolation is setting yourself apart which may or may not be noticed, withdrawal is declining yourself from something, while an outburst of anger is very clearly seen and heard by all. All in all, I would say D.
