Emotional appeal is a logical fallacy, whereby a debater attempts to win an argument by trying to get an emotional reaction from the opponent and audience.
Your answers are B, C, and D. As they all three have something to do with an emotional response.
Because it does not say dear (put inserted name here) and then start the email/letter
I'd say option C.
Hope this helped! Good luck :)
Lunacy I think, hope that helps