B2.C3.D4.B5.D6.D7.C8.B9B10.c11.C12c13A14c15B16B17D18C19A5 1.B 2.C 3.D 4.B 5.D 6.D 7.C 8.B 9 B 10.C 11.C 12.C 13.A 14c 15 B 16 B 17 D 18 C 19A 20A