If hemoglobin's Hill plot shows a KD value of 0.1 in the final region, what does this indicate about its oxygen affinity?

• A. Hemoglobin has high oxygen affinity in the final region.
• B. Hemoglobin has low oxygen affinity in the final region.
• C. Hemoglobin has no oxygen affinity in the final region.
• D. Hemoglobin has medium oxygen affinity in the final region.

Answer: (A)