Read the passage: 'Ocean acidification occurs when seawater absorbs carbon dioxide from the atmosphere, lowering its pH. Marine biologists are particularly concerned about coral reefs, as more acidic water interferes with corals' ability to build their calcium carbonate skeletons.' What problem does ocean acidification cause for corals?
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A
It raises water temperatures too high for coral survival
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B
It prevents corals from building their skeletons
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C
It reduces the amount of sunlight reaching coral reefs
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D
It increases the salt content of seawater