单选题：Itcanbeknownfromthepassagethatincreaseinthesalinityofoceanwa

题目内容：

Itcanbeknownfromthepassagethatincreaseinthesalinityofoceanwateriscausedby______ A．meltingofseaice
B．precipitation
C．evaporation
D．supplementofsalt

参考答案：

答案解析：

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