单选题 According to the text, which of the following statements is true?

A、 Though the situation is not urgent, we should press forward with our marine research,
B、 Nations throughout the world must be provided with fish, fresh or frozen, for needed protein.
C、 There are enough fish in the U.S. seas to allow for the annual protein needs of a quarter of the world's 5 billion people.
D、 The oceans are the major source of the world's protein supply.

【正确答案】 C

【答案解析】[注释] 细节辨认题。本题问：根据本文，下面哪一条是正确的?参阅第2段第2句：“仅仅利用美国水域未开发的渔业资源就能得到足够的鱼类蛋白质浓缩物来为十亿多人提供一年补充的动物蛋白，其成本是每人每天不到半分钱。”所以，答案应为[C]。