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Multiple Choice
In the context of B cell development and adaptive immunity, which cell type is primarily responsible for humoral immunity (antibody-mediated immunity)?
A
B lymphocytes (B cells), which can differentiate into antibody-secreting plasma cells
B
Natural killer (NK) cells, which lyse cells with low MHC class I expression
C
CD8+ cytotoxic T lymphocytes, which directly kill virus-infected cells
D
Neutrophils, which provide rapid phagocytic defense in innate immunity