For a T cell dependent immune response, which best describes how antigen-specific B cells and T cells find each other following antigen binding?

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B and T cells alter migration within their respective zones, increasing the probability of encountering each other

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B and T cells arrest on dendritic cells as they encounter antigen, increasing the probability of encountering each other

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Binding to the same antigen brings them into physical contact

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T cells gain expression of CXCR5 and enter B cell follicles to find their cognate B cells

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