C. B40
- When skeletal maturity differs from lean maturity, slightly more emphasis is placed on the skeletal evidences.
- In no case can the overall maturity be more than one full maturity group different than indicated by the skeletal differences. When bullock carcasses have a darker color of lean than specified for the quality levels for which they would otherwise qualify for, the overall maturity will be based on skeletal maturity only and the final grade will be determined in accordance with the procedures for dark cutters.
B 70 (bone), A 90 (lean) = B 30 = B 40 (adjust to bone)
Therefore, the correct option is C.
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