B Cells Can Generate Antibodies with Over 10¹⁰ Different Antigen-Binding

Multiple Choice

B cells can generate antibodies with over 10¹⁰ different antigen-binding sites.How do so many different antibodies fit onto a single B cell?

A) B cells are unusually large cells.
B) B cells have wavy, invaginated plasma membranes to provide more surface area.
C) B cells have long flagella-like extensions to provide more surface area.
D) They don't -- each B cell makes only a single variety of antibody.