Which of the Following Is Consistent with a Recently Antigen-Activated

Which of the following is consistent with a recently antigen-activated mast cell?

A) high levels of MHC class II molecules on the cell surface
B) the absence of prepackaged granules
C) the absence of IgE on the cell surface
D) high concentrations of C3b on the cell surface
E) the induction of antibody-dependent cell-mediated cytotoxicity.