Which type of protein should a vegan client mix to obtain all essential amino acids?

The option indicating complementary plant proteins is correct because this approach allows a vegan client to consume a combination of plant-based foods that together provide all essential amino acids necessary for health. While individual plant proteins often lack one or more essential amino acids, by strategically combining different sources—such as beans with rice or peanut butter with whole grain bread—one can achieve a complete amino acid profile similar to that found in animal proteins.

For a vegan diet, relying solely on single source plant proteins typically does not ensure adequate intake of all essential amino acids, which is why this method is typically less effective. Modified plant proteins may not address the fundamental need for a complete amino acid spectrum that comes from complementary sources. Animal proteins are not applicable in this context, as vegans avoid all animal-derived products. Thus, the combination of complementary plant proteins is the most suitable solution for meeting the protein needs of a vegan client.