Block Treatment Yield 1 A 89 1 B 88 1 C 97 1 D 94 2 A 84 2 B 77 2 C 92 2 D 79 3 A 81 3 B 87 3 C 87 3 D 85 4 A 87 4 B 92 4 C 89 4 D 84 5 A 79 5 B 81 5 C 80 5 D 88