A college student eats a lunch consisting of a turkey sandwich on whole wheat bread, a side salad with mixed vegetables, and a medium apple. Which property of a healthful diet is primarily demonstrated by this meal and why?

• A. Variety, because the meal includes different brands of the same bread type to prevent repeated exposure to one wheat cultivar.
• B. Balance, because multiple food groups (grains, protein, fruits, vegetables) are represented in appropriate combinations to meet different nutrient needs.
• C. Adequacy, because the meal is low in fat and therefore guarantees sufficient calories for daily requirements without checking other nutrient targets.
• D. Moderation, because the student avoided all fats and sugars entirely which ensures no overnutrition occurs.

Answer: (B)