Answer:
E. Expressing doubts about whether most human beings today are as healthy as our prehistoric ancestors were
Explanation:
Sasha made a statement about our ancestors being healthy and evolving by feeding on diets that are rich in animal protiens and fats. Though her assumption might be correct, she forgot to factor in the assumption of Jamal which also contribute towards the health of our ancestors- the amount of physicaly activity which could be quantified as exercise which our ancestors engaged in while searching for those foods.
Jamal was of the opinion that exercise and good diet contribute towards the health of our ancestors unlike what is obtainable now where people are not exercising leading to becoming less physically active.