What Was the Cause of Flooding in the 1993 Upper

Multiple Choice

What was the cause of flooding in the 1993 upper Mississippi River flood?

A) Heavy snowmelt in Canada sent large volumes of water down the river in the spring.
B) A dam failed because it had been built in a risky place near a fault.
C) Persistent thunderstorms caused large amounts of rainfall over a several-state region.
D) Winter produced rain that melted snow that was on the ground.