Which Factors on the Surfaces of B Cells and T

Multiple Choice

Which factors on the surfaces of B cells and T cells, through their interaction, are required to allow germinal center formation to occur?

A) CD40 and CD40L.
B) Fas and FasL.
C) CD28 and CD80/86.
D) TCR and MHC class II.
E) None of the answers are correct.