Our Evolved Digestive and Metabolic Physiology and Biochemistry

Our evolved digestive and metabolic physiology and biochemistry:

A) are not well-suited to many of the ingredients used in processed foods today.
B) can easily handle industrially processed food; it is unprocessed food that is hard to digest.
C) have kept up incredibly well with changes in our food supply, so that things like artificial sugar do not cause our bodies any problems.
D) have not changed since well before the onset of pastoralism and agriculture.
E) make it very hard for most people to get fat.