Answer: Man vs. Supernatural
Explanation:
A conflict is refered to as a struggle that occurs between two opposing forces.
Man vs. the Supernatural is a form of conflict which is when the man faces opposition in the form of a supernatural force like a ghost, fate, superstitions.
In this case Erowyn faces opposition from an email wizard.
I would say D, since A and B would be highly irrelevant. C sounds like a possible answer, but could still be viewed as irrelevant since it doesn't actually contain info about MP3 players.
It's a use of literary styles and techniques to create factually accurate narritives. I found this on google.