Question: Which of the mechanisms below can explain why high protein diets are optimal for weight loss and weight maintenance?

A: Synergistic effect of GLP-1 and PYY on the appetite centres in the brain
B: Preservation of lean body mass
C: A higher thermic effect of protein than carbohydrates and fats
D: All of the options above
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. The word "weight" should not appear in your response.
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