On the left is a lymph node taken from a person during an ac…

On the left is a lymph node taken from a person during an active immune response. MZ = mantle zone; LZ = light zone and DZ = dark zone. This left image tissue is stained with H and E. The right image is from an adjacent tissue section stained by an anti-CD21 antibody. CD21 can be located on follicular dendritic cells or B cells. What type of T cell is most likely to be prominent in the same region as the region that stains with the anti-CD21 antibody?