(单选题)

According to the author, why fish resources are diminishing? ( )

A.cause no new substitutes can be found available.
B. Because water pollution causes serious problems.

B.Because they are not owned by any particular entity.

C.Because fishing method is not sustainable.

参考答案：C

参考解析：

根据关键词fish定位至最后一段Markets cannot always keep the environment healthy. If no one owns the resource concerned, no one has an interest in conserving it or fostering it: fish is the best example of this.可知作者只是以“鱼”为例说明“如果人们不拥有关心的资源，人们对保护或者养殖也不感兴趣，市场是无法一直保持环境的健康。”题干问：为什么鱼类资源在减少？选项A：因为没有找到新替代品；选项B：因为水污染引起的严重问题，无中生有；选项C：因为鱼类资源不被任何实体拥有；选项D：因为捕鱼方式不可持续，无中生有。故本题正确答案选C。

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