When Considering the Key-Nutrient Concept, Which of the Following Is

When considering the key-nutrient concept, which of the following is NOT true?

A) The theory is based on the eight nutrients central to human nutrition
B) Highly processed foods to which some vitamins have been added are acceptable to this concept
C) If the key nutrients are adequate in your diet, you will probably receive an ample supply of all nutrients essential to humans
D) The Food Exchange Lists can be a useful guide to securing the key nutrients, if one keeps in mind
That there is some variation in the proportion of the nutrients within each food exchange