One Evolutionary Explanation for Obesity Suggests That

One evolutionary explanation for obesity suggests that

A) we secrete too much leptin.
B) because our ancestors suffered from times of famine, we have evolved a tendency to overeat and to store fat.
C) it results from failure to change learned eating habits.
D) some people have evolved to be under-sensitive to leptin levels.
E) because in the past thinness was associated with failure to reproduce, women have an instinctive desire to put on weight.