33. When he designs the PCR primer pairs that contain the restriction enzyme cutting sequences, which of the following primer pairs is his best choice? (A) the forward primer with BamH I; the reverse primer with Xho I (B) the forward primer with Xho I; the reverse primer with EcoR I (C) the forward primer with BamH I; the reverse primer with Hind III (D) the forward primer with EcoR I; the reverse primer with Xho I (E) the forward primer with Hind III; the reverse primer with BamH I