A nurse is reinforcing teaching about nutritional needs of preschoolers with a group of parents. Which of the following foods should the nurse recommend as a source of complete protein?

A. Eggs: Eggs are a source of complete protein because they contain all nine essential amino acids in the right proportions needed for growth and maintenance. This makes them ideal for meeting the protein requirements of preschool-aged children. B. Broccoli: While broccoli contains some protein, it is not considered a complete protein because it lacks certain essential amino acids. It is better classified as a source of fiber, vitamins, and minerals rather than a primary protein source. C. Peanut butter: Peanut butter is high in protein but is incomplete on its own since it does not contain all the essential amino acids in adequate amounts. Pairing it with whole grains can help create a complete protein profile. D. Pinto beans: Pinto beans are rich in plant-based protein but do not provide a complete amino acid profile. Like other legumes, they must be combined with complementary proteins such as rice to meet all essential amino acid needs.