1: B 2: C 3: B 4: D 5: A 6: C 7: D 8: B 9: C 10: A 11: A 12: B 13: D 14: B 15: A 16: C 17: B 18: A 19: B 20: D 21: D 22: A 23: D 24: D 25: C 26: A 27: D 28: B 29: A 30: BC 31: B 32: A 33: B 34: A 35: A 36: C 37: A 38: A 39: D 40: D 41: A 42: C 43: ABD 44: BCD 45: ABCD 46: BCD 47: ABCD 48: ABD 49: AB 50: BCD 51: ACD 52: √ 53: × 54: √ 55: × 56: √ 57: × 58: √ 59: √ 60: √ 61: √