Studies of graft rejection using cells labeled with fluorescent markers demonstrate that
A. any infiltration of a skin graft depends on MHC mismatch.
B. deep infiltration of a skin graft depends on MHC mismatch.
C. antigen-presenting cells from a skin graft migrate to lymph nodes and present antigen there.
D. host antigen-presenting cells enter the skin graft, then migrate to lymph nodes.
E. Both B and D.
E
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Fill in the blank(s) with correct word