What Is the Role of B Cell Receptors (BCRs) and T

What is the role of B cell receptors (BCRs) and T cell receptors (TCRs) in the immune response?

A) to release the cytokines needs for immune cell stimulation
B) to combine with haptens so they can stimulate an immune response
C) to communicate with lymphocytes and other white blood cells
D) to recognize specific epitopes of an antigen
E) to release chemicals which destroy pathogens