Which Statement About the B Cells' Abilities to Produce Antibodies

Which statement about the B cells' abilities to produce antibodies is most accurate?

A) B cells wait to encounter an antigen and then copy it.
B) There are no B cells until an antigen is encountered.
C) There may be 100 million different B-cells, each producing a different antibody.
D) Most B cells are capable of producing any kind of antibody.
E) B cells don't produce antibodies until they develop in the thymus.