Well, despite what some of my associates are saying, I do not regard the Anime Addict protagonist to be a complete pedophile, considering that depending on your choices he may not display any pedophilic tendencies whatsoever. Therefore, he does not satisfy the conditions of B.
Also despite what some of my associates are saying, I couldn't find any path in A Very Special CYOA which involve becoming an AIDS-infected crack whore. While it is possible to contract AIDS in that storygame, it is not done by exchanging sexual services for crack, so it does not satisfy the conditions of C.
Of course, I couldn't find A or D anywhere either, so we'll have to examine the likelihood that you wrote one of these and never published it. This shifts the likelihood onto A or B, because these, being the most fucked up, would be the ones which you would presumably least want to unleash upon the world. Or maybe you would prefer to unleash them. So this point doesn't count for much, I suppose.
I think C is less likely because you tend to write about protagonists who struggle with emotional issues, while crack addiction is a physiological issue for the most part.
D is a possibility... suicide bomber seems like the one which you would be least likely to come up with off the top of your head for the purpose of inclusion in this quiz, because it's the greatest departure from what you normally write. Perhaps you wrote D in the past, when you had somewhat different interests?
Back to A, you certainly expressed a disapproval of the Nazis in A Very Special CYOA. Would this be enough to dissuade you from writing about a Nazi protagonist? I'm going to say not. Another thing worth mentioning is that this idea may leave some room for the player's decisions to have an effect on the nature of the protagonist's psychological problems, which is something you often like to do. This is in contrast to B and D, in which the protagonist's psychological problems seem to be predetermined.
Another strike against B is that it, being an Endmaster storygame, it would have to include explicit detail. I may be wrong, but I'm going to go out on a limb and say that you have never felt the desire to write explicit scenes of pedophilia. (This is assuming that "pedophilia" refers to sexual attraction to pre-pubescent individuals, and not whatever nonsense my associates are blathering about.)
So, final answer: A.