Which statement about cancer defense is FALSE?

Which statement about cancer defense is FALSE?
  a. Natural killer and T cytotoxic cells destroy cancer cells.
  b. Cancer antigens stimulate a strong immune response.
  c. Monoclonal antibodies can deliver toxic drugs to cancer cells.
  d. T cells produce interleukins, which defend against cancer.
  e. Macrophages produce tumor necrosis factor, which inhibits tumor growth.

Question 2

Autoimmunity is a(n):
  a. automatic response to an antigen.
  b. failure of self cell recognition.
  c. reaction to environmental antigens.
  d. normal response to infection.
  e. response between the autonomic nervous system and the immune system.