A little under a million years ago, the briny waters of the Baltic Sea began flooding into the cold
(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 cataclysmic(D)
(E) whether the flood was gradual or it created a cataclysm
debate about 不对吗??or后面为什么不能加其他东西?
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