42. Which of the following statements about the gut-associated lymphoid tissue are true?
(A) The normal maturation of the intestinal mucosa and the gut-associated lymphoid tissue is initiated at
birth by colonization of the intestines by the commensal microbiota.
(B) In the intestines of germ-free mice, Peyer's patches develop normally, and isolated lymphoid follicles
are present.
(C) Type 3 innate lymphoid cell subset is instrumental in organizing development of the gut-associated
lymphoid tissue.
(D) At maturity, the intestines maintain the largest number and diversity of commensal microbes in or on
the body.