12. Which of the following is the most effective and least costly strategy for preventing an iron deficiency?
a. Consume iron supplements at a level 2 to 3 times the RDA.
b. Switch to iron cooking utensils and eat four of more servings of red meat daily.
c. Eat small amounts of citrus products and increase intake of low-fat milk.
d. Eat small portions of meat, fish, and poultry routinely with liberal portions of vegetables and legumes.