The following statements are made about how CD4 T cells provide help to CD8 T cells.

A. Antigen/MHC-II complexes on CD4 T cells interact with antigen/MHC-I complexes on CD8 cells.

B. A single dendritic cell (DC) presents antigen on MHC-I and MHC-II at the same time. 

C. CD4 T cells activate DCs which produce chemokines like CCL3 and CCL4 that can specifically attract CD8 T cells to form a CD4-CD8-DC triad.

D. CD4 T cells help B cells, which differentiate into plasma cells and secrete antibodies that form immune complexes which bind to FcγRs on CD8 T cells.

Which one of the following options represents the combination of all correct statements?