다음 글의 흐름상 가장 어색한 문장은? Biologists have identified a gene that will allow rice plants to survive being submerged in water for up to two weeks―over a week longer than at present. Plants under water for longer than a week are deprived of oxygen and wither and perish.

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4. This is dreadful news for people in these vulnerable regions, who are victims of urbanization and have a shortage of crops. Rice yields must increase by 30 percent over the next 20 years to ensure a billion people can receive their staple diet.

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The scientists hope their discovery will prolong the harvests of crops in regions that are susceptible to flooding.

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Rice growers in these flood-prone areas of Asia lose an estimated one billion dollars annually to excessively waterlogged rice paddies.

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They hope the new gene will lead to a hardier rice strain that will reduce the financial damage incurred in typhoon and monsoon seasons and lead to bumper harvests.

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This is dreadful news for people in these vulnerable regions, who are victims of urbanization and have a shortage of crops. Rice yields must increase by 30 percent over the next 20 years to ensure a billion people can receive their staple diet.