Two adults each consume 70 g of protein daily. Person A's protein comes mostly from high-PDCAAS animal foods; Person B's protein comes mostly from low digestibility plant sources missing a limiting amino acid. Which statement best predicts their relative adequacy of essential amino acids and why?

• A. Person A will be deficient because animal proteins lack essential amino acids compared with plants
• B. Person A is more likely to meet essential amino acid requirements because higher PDCAAS proteins provide all essential amino acids in bioavailable forms, whereas Person B may lack one or more EAAs despite equal total grams
• C. Both are equally adequate because total grams of protein alone determine essential amino acid sufficiency regardless of amino acid pattern or digestibility
• D. Person B will always have better EAA status because plant proteins stimulate endogenous synthesis of all EAAs

Answer: (B)