Final answer:
To align Hilda's lunch with the dietitian's instructions, she should add 1 cup of fat-free soy milk and a small apple to include necessary servings of dairy and fruit.
Step-by-step explanation:
To make Hilda's current lunch meet the dietitian's instructions, the appropriate change would be: D. Add 1 cup fat-free soy milk and 1 small apple.
The dietitian recommends that Hilda includes 4CHO servings with at least 1 protein serving at each main meal, and 1 CHO serving with a protein serving at her evening snack. Given the information about the MyPlate nutritional guide, which suggests including fruits and vegetables, grains, protein, and a dairy product at each meal, option D fits the criteria by adding a serving of dairy (fat-free soy milk) and a fruit (small apple) to her lunch. This option complements the sandwich, baked potato chips, and blueberries that are already part of her lunch, ensuring a variety of food groups and adhering to the recommendations for a balanced meal.