Match each of the following components of the mucosal immune system with their corresponding mechanism Microfold (M) cells [ Choose] Lamina propria [ Choose ] Contains CD4+ T cells, CD8+ T cells, and B cells Become activated following NKG2D ligation with MIC-A/B on stressed epithelial cells Type A CD8+ intraepithelial lymphocytes (IELs) Produce mucus Type B CD8+ intraepithelial lymphocytes (IELS) Use transcytosis for antigen transfer Require polymeric Ig receptor (plgR) for transfer into the intestinal lumen Compete with pathogenic bacteria Kill infected cells using perforin/granzyme and FasL after TCR activation IgA dimers [ Choose ]