Which statement is true about T cells?
A) They usually directly recognize antigens, which then activates a subpopulation of killer cells.
B) T-Cells only recognize fragments of antigenic proteins that have been processed and are presented.
C) Activated T-Cells produced antibodies.
D) T-Cells will develop into cytotoxic T cells if an antigen is complexed with class II MHC proteins.
Answer: B) T-Cells only recognize fragments of antigenic proteins that have been processed and are presented