Because I Want to Create a Helper T Cell Response

Multiple Choice

Because I want to create a helper T cell response that will help create a cytotoxic response, I am going first to load the MHC molecule myself artificially. To fit the MHC molecule that I want and create the first response that I want, what peptide size should I use and what cytokine(s) do I hope will be secreted?

A) 13-18 amino acids and IL-12 by the antigen-presenting cell to create a TH1 response
B) 8-10 amino acids and IL-4 by the antigen-presenting cell to create a TH2 response
C) 13-18 amino acids and IL-2 by the antigen-presenting cell to create a TH2 response
D) 8-10 amino acids and IL-12 by the antigen-presenting cell to create a TH2 response