Which Statement Is Not True About MHC II

Which statement is not true about MHC II?

A) MHC II primarily displays extracellular antigens which have been phagocytized.
B) MHC II is present only on antigen- presenting cells.
C) When bound to antigen, MHC II serves a key role in activation of the appropriate T cells.
D) MHC II interacts with the CD4 receptor on T helper cells.
E) MHC II interacts with both the CD4 and CD8 receptors on T helper and T cytotoxic cells.