After learning about the history of intake guidelines, students know that simply reading a food's nutrition facts label may not be enough to understand the health effects of the food. Which statement reflects the current focus of work in nutrients and food?

A) Total amounts of nutrients consumed should be regulated, without regard for the food source of the nutrients.
B) After a study found that beta carotene protected against cancer, large amounts of the nutrient are now recommended to clients at high risk for cancer.
C) Intake guidelines that focus solely on nutrients can underestimate the complexity of food.
D) The health effects of foods can be simply and accurately reduced to the effects of single nutrients.