Which of the Following Best Characterizes the Process of Clonal

Which of the following best characterizes the process of clonal selection that occurs after exposure to a particular pathogen?

A) B cells show the ability to adapt the specific type of receptors they produce and so all B cells in the body undergo an alteration to respond to a particular infection.
B) Only a small subset of B cells will have receptors that bind a particular pathogen and it is specifically these cells that are stimulated to multiply to fight the infection.
C) Pathogens typically reproduce clonally and "clonal selection" refers to the process of selection among pathogen lines to determine which are successful during host infection.
D) All of the statements are accurate characterizations of the process of clonal selection