Researchers Have Established That Diets Rich in Lean Poultry, Fish

Multiple Choice

Researchers have established that diets rich in lean poultry, fish, legumes, and fresh fruits and vegetables are the healthiest. However, on average, people who follow such a diet generally have more serious health problems, such as diabetes and heart disease, than does the general population.
Which one of the following, if true, most helps resolve the apparent paradox above?

A) On average, the recommended diet is more expensive than an average diet, meaning few people are able to follow it.
B) Most people only adopt the recommended diet after already developing serious health problems.
C) The recommended diet means that many people cannot eat their favorite foods and so eventually revert back to a more conventional diet.
D) The recommended diet has dramatic benefits for some people but only marginal benefits for others.
E) For some people with certain genetic conditions, the recommended diet is not appropriate.