What Is the Main Function of Secretory Component

Multiple Choice

What is the main function of secretory component?

A) To join two IgA monomers as dimeric IgA
B) To allow IgA translocation across the mucosal epithelium
C) To protect secretory IgA against degradation by proteases
D) To allow antigen binding to the Fab portions of secretory IgA
E) To increase the rate at which IgA is secreted by plasma cells