Primary Immunodeficiencies That Affect B Cells Are Often Characterized by

Multiple Choice

Primary immunodeficiencies that affect B cells are often characterized by

A) T cells help fully activate B cells.
B) T cells help trigger class switching.
C) T cells help regulate antigen presentation by dendritic cells.
D) T cells help to both fully activate B cells and trigger class switching.
E) T cells help to both fully activate B cells and regulate antigen presentation by dendritic cells.