Why would removal of the thymus compromise humoral immunity?
A. Once activated, B cells must travel to the thymus in order to produce antibodies.
B. Helper T cells mature in the thymus and are needed to activate B cells and humoral immunity.
C. B cells responsible for humoral immunity mature in the thymus.
D. Most mature B cells reside in the thymus, so removing the thymus removes the majority of the body's B cells.
Answer: B
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