词汇精练——accumulate

There seem to have been several periods within the last tens of thousands of years when water accumulated in these basins. The rise and fall of the lakes were undoubtedly linked to the advances and retreats of the great ice sheets that covered much of the northern part of the North American continent during those times.
The word "accumulated" is closest in meaning to which of following?
(A) dried
(B) flooded
(C) collected
(D) evaporated

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