I'm in a similar situation. I'm a cis-gen white male but I'm also considered a "non-traditional student as I'm applying to law school at the age of 32. I feel as though I have a diverse story to tell and plan on doing so.
D is incorrect because Sims is refusing to respond to the argument. Instead of arguing against the legitimacy of Rotelle's argument, Sims is just quipping back about Rotelle's age. E describes this issue perfectly.
I'm being inundated with emails, and they know nothing about me other than my name, age, and email so far. I'm not putting much stock in them at this point.