Which Is the Proper Order of Events in Cell-Mediated Immunity

Multiple Choice

Which is the proper order of events in cell-mediated immunity?
(1) Cloning of cytotoxic T cells and memory T cells
(2) Antigen presented to T lymphocyte
(3) Activation of T lymphocytes
(4) Cytotoxic T cells attack target cells

A) 2, 3, 4, 1
B) 1, 4, 2, 3
C) 2, 3, 1, 4
D) 3, 2, 4, 1
E) 1, 2, 3, 4,