One Important Principle of a Healthy Diet Is to Eat

One important principle of a healthy diet is to eat a variety of foods.In this context,"variety" refers to:

A) choosing at least one food from each food group on the Food Pyramid daily.
B) including low calorie food choices to balance high calorie foods at each meal.
C) choosing a variety of foods from within food groups as well as among food groups.
D) making sure portion sizes are matched to energy needs.