题目内容：
根据下列文章，回答题。
The animal source which provides the most protein for human being is＿＿＿．
[A] beef
[B] fish
[C] pork
[D] chicken
参考答案：
答案解析：
单选题：根据下列文章，回答题。The animal source which provides the most protein
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The animal source which provides the most protein for human being is＿＿＿．
[A] beef
[B] fish
[C] pork
[D] chicken