Both sentences A and B seem to be loosely related, as they talk of our protein needs--A, about how our relatively low protein requirement compared to mammals, and B, about the adverse consequences of tinkering with our natural needs. There is also an obvious link between sentences C and D, in that both relate to formula milk. D talks of how cow's milk formula containing excessive protein was found to cause rapid growth rate in early life, and C relates the effect of this in later life. DC is a strong link. Now, sentence A compares our protein needs to that of other mammals. Though cows are mammals and the sentence group DC compares human milk to cow's milk, ADC does not make a cogent paragraph, as the focus of A is on how small a percentage of protein we need to make up our calorie requirement. However, sentence B, which speaks of the adverse consequences of tinkering with our natural protein needs fits right in with the message in the sentence group DC. BDC makes a cogent paragraph. So, sentence A is the odd one out. Correct Answer: Choice (A)
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