Select the Statement That Best Explains Why It Has Not

Select the statement that best explains why it has not been possible to develop a vaccine for HIV.

A) HIV rapidly replicates and undergoes mutations so frequently that even small changes in its proteins make the virus unrecognizable to host immune cells.
B) The current understanding of the metabolic process and identification of the subtypes of HIV is not yet enough to create a vaccine that would protect against all of the subtypes of HIV.
C) The macrophages, dendritic cells, and T and B cells interact with the protein components of HIV; therefore, no vaccine can be developed until a solution to the interaction between the cells of the body and the protein components is found.
D) None of these are correct.