60. A swine producer has four boars that he is considering using as replacement boars in his breeding program. He is paid incentives to produce lean carcasses. Based on the performance data, which of the boars is most likely to sire the most productive offspring for his operation? Boar Days to 250 BF LEA Stress 1 135 0.75 7.00 Pos 2 138 0.61 7.50 Neg 3 148 0.78 7.20 Neg 4 152 0.60 8.10 Neg A. Boar 1 b. Boar 2 c. Boar 3 d. Boar 4