Which of the following statements about epitopes are correct? I.B-cell receptors bind to epitopes. II.T-cell receptors bind to epitopes. III.There can be several different epitopes on each antigen. IV.There is a one-to-one correspondence between antigen and epitope.
A)only I and III B)only II and IV C)only I, II, and III D)only II and III E)only I and IV