다음 글의 흐름상 가장 어색한 문장은? Researchers have developed a new model they said will provide better estimates about the North Atlantic right whale population, and the news isn't good.

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4. The new research model has successfully demonstrated that the number of right whales has remained intact despite the worrisome, widening population gap between whale males and females.

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The model could be critically important to efforts to save the endangered species, which is in the midst of a year of high mortality, said Peter Corkeron, who leads the large whale team for the National Oceanic and Atmospheric Administration's Northeast Fisheries Science Center.

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The agency said the analysis shows the probability the population has declined since 2010 is nearly 100 percent.

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"One problem was, are they really going down or are we not seeing them? They really have gone down, and that's the bottom line," Corkeron said.

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The new research model has successfully demonstrated that the number of right whales has remained intact despite the worrisome, widening population gap between whale males and females.