题目内容：
What was the main finding of the study?
A．
The warming of the world's oceans is not a threa A．The warming of the world's oceans is not a threa
B． That not enough is being done about global warmin
B． That not enough is being done about global warmin
C． There is a puzzling gap between the model and observation
C． There is a puzzling gap between the model and observation
D． Ocean waters have warmed faster than scientists had previously though
D． Ocean waters have warmed faster than scientists had previously though
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答案解析：