36.EcoRI has a restriction site of GLAATTC while EcoRV has a restriction site of GATVATC. Based upon this, EcoRI produces___________ and EcoRV produces___________. (A)a5' overhang；a 3' overhang (B)a 5' overhang； a 5' overhang (C) a5' overhang； blunt ends (D)a 3' overhang； a 5' overhang (E)a 3' overhang； blunt ends