T-cell help of B cells will be impaired if the T cells lack CD28 because
A) CD28 is needed to activate class switching by turning on AICD.
B) CD28 is needed to interact with CD40 on the B cell.
C) CD28 is needed to signal through the B-cell receptor.
D) CD28 is needed to signal through the T-cell receptor.
E) None of the answers are correct.
Correct Answer:
Verified
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