試題詳解

49. Which of the following most accurately describes a mechanism leading to autoimmune disease?
(A) Clonal expansion of autoreactive T cells in the absence of regulatory T cell inhibition.
(B) Failure of macrophages to recognize bacterial pathogens, leading to autoantibody production.
(C) Excessive activation of the complement system in response to allergens.
(D) Increased function of regulatory T cells that suppress immune responses to self-antigens.
(E) Overproduction of IgA antibodies that neutralize self-antigens.