Which One of the Following Statements About T Cells Involved

Multiple Choice

Which one of the following statements about T cells involved in an immune response is NOT true?

A) Activated T cells receive survival signals from antigen during an infection.
B) Activated T cells contribute to the activation of antigen-presenting cells via CD40 ligand.
C) Memory T cells generated during a primary immune response express high levels of interleukin-2 receptors and actively proliferate long after the primary response is completed.
D) The major effector function of helper T cells is to activate macrophages and other cells by releasing cytokines.
E) When an infection is eliminated,activated T cells die by apoptosis.