Which of the Following Factors Generally Favors Stimulation of an Adaptive

Multiple Choice

Which of the following factors generally favors stimulation of an adaptive immune response to an antigen,and not tolerance?

A) Intravenous portal of entry of antigen
B) Presence of antigen in generative lymphoid organs
C) Absence of costimulatory molecules on antigen-presenting cells
D) Innate immune response to the antigen
E) Presence of antigen during the neonatal period