Which Statement Has NOT Been Offered as an Explanation for the Relationship

Which statement has NOT been offered as an explanation for the relationship between obesity and socioeconomic status?

A) Lower-income people have more limited access to health care services.
B) Less-educated people may lack knowledge about the hazards of obesity.
C) The stress of poverty may trigger increased eating as a defensive coping mechanism.
D) Lower-income people have lower levels of willpower.