The correct answer is D. Spinach and mandarin orange.
Step-by-step explanation:
Iron is a mineral and essential nutrient because this helps the body in the function of transporting and storing oxygen. Due to this, it is important to include foods that are high in iron, this includes red meat, eggs, and fish (animal-based food) and spinach, lentils, nuts, among others (plant-based food). Additionally, the absorption of iron is prompted if the food that is rich in vitamin C such as oranges or mandarin oranged is consumed along with foods rich in iron.
This implies, in the case of a vegetarian person who cannot consume meat, eggs, fish or similar the best is "Spinach and mandarin orange" because spinach is a food rich in iron and by eating this, along with mandarin orange that contains vitamin C iron absorption is maximized.