I believe the answer is: C. fruits, grains, protein, dairy, vegetables
USDA’s MyPlate Food Guidance System is aimed to fulfill both our macronutrients (protein, carbohydrates, and Fat) and our micronutrients (minerals and vitamins).
Grains and protein contained the most substance to fulfill our macronutrient needs and fruits, vegetables, and dairy contained the most substance to fulfill our micronutrients.