A person eats the exact same green smoothie every day for breakfast, lunch, and dinner for three months. Which property of a healthful diet is most clearly violated, and what is the primary nutritional risk from this behavior?

• A. Nutrient density is violated; the primary risk is that green smoothies are always low in calories and therefore cannot meet energy needs.
• B. Variety is violated; the primary risk is developing nutrient shortfalls because even nutrient-rich foods are uneven in particular vitamins and minerals over time.
• C. Balance is violated; the primary risk is lack of fiber because smoothies never contain fiber-rich ingredients and therefore cause chronic constipation.
• D. Moderation is violated; the primary risk is immediate calorie excess from consuming a single food repeatedly regardless of its nutrient profile.

Answer: (B)