19. RFLP analysis can be used to distinguish between alleles based on differences in which of the following?
(A) the ability of nucleic acid probes to hybridize to the alleles
(B) the proteins expressed from the alleles
(C) the ability of the alleles to be replicated in bacterial cells
(D) the amount of DNA amplified from the alleles during PCR
(E) restriction enzyme recognition sites between the alleles