A nurse is reinforcing teaching about the 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. Pinto beans are an excellent source of protein but are considered an incomplete protein because they lack some essential amino acids. Combining them with other plant-based foods (e.g., ricE. can create a complete protein. B. Eggs are a complete protein source, meaning they contain all nine essential amino acids required for growth and development. They are an ideal protein source for preschoolers. C. Broccoli is a nutritious vegetable but is not a significant source of protein. It provides fiber, vitamins, and minerals but does not contain all essential amino acids. D. Peanut butter is high in protein but is also an incomplete protein. Like beans, it must be combined with complementary proteins, such as whole grains, to provide all essential amino acids.