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听力原文: Flood waters are receding in parts of the upper mid-western United States while
'The people were evacuated but there is no, they aren't underwater, but they're fight behind the dyke. And if the dyke were to go, they wouldn’t have time to get out. '
The Minnesota River is one of its several in the state of Minnesota, North Dakota and South Dakota that has run out of its banks because of the melting snow and heavy rain during the past week. President Clinton has declared many counties in all three states fatal disaster areas and flooding is expected to continue for a few more weeks as last winter’s record snowfall continues to melt. Michael Leland VOA news Chicago."
What caused the Minnesota River to run out of its bank?
A.The heavy snowfall.
B.The melting snow and heavy rain.
C.The tropical storm.
D.The dike has been destroyed.