You Are Excavating a Native American Human Burial Site Which

You are excavating a Native American human burial site which contains both males and females. After obtaining permission from current Native American tribes believed to have descended from these people, you analyze the bones. You notice a higher rate of osteoarthritis in the lumbar vertebrae of the female skeletons in comparison to the male skeletons. What might you conclude from this evidence?

A) Females were doing more intense walking than the males, traveling far distances to gather plants.
B) Females were putting more stress on their backs, perhaps from grinding corn or carrying children.
C) Females did not have access to the same amount of high quality food as males, and were thus suffering from malnutrition.
D) All of the answers are correct.