Which Statement Is True

Which statement is true?

A) The enormous diversity of different lymphocyte receptors needed for adaptive immune defenses is generated after the body encounters antigens for these receptors.
B) A given lymphocyte responds to several antigens.
C) Nuclear DNA in a mature B cell is the same as the nuclear DNA in any other cell in the body.
D) Binding of an antibody to an antigen on a B cell stimulates the cell to divide, forming a clone of cells whose members all secrete different antibodies, specific for different antigens.
E) Binding of a cancer cell antigen to a T cell receptor can activate the T cell to divide and produce a clone of cells, whose members all have that particular receptor.