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12. A little under a million years ago, the briny waters of the Baltic Sea began flooding



12.        A little under a million years ago, the briny waters of the Baltic Sea began flooding into the cold North Atlantic: geologists are still debating whether the flood was gradual or created a cataclysm.



(A) whether the flood was gradual or created a cataclysm
(B) if the flood was gradual or created a cataclysm
(C) about whether the flood was gradual or cataclysmic
(D) whether the flood was gradual or cataclysmicD
(E) whether the flood was gradual or it created a cataclysm

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