Final answer:
The correct answer is d. Over four square miles of the town are leveled.
Step-by-step explanation:
The correct answer is d. Over four square miles of the town are leveled.
The Johnstown flood was a devastating flood that occurred on May 31, 1889, in Johnstown, Pennsylvania.
It was caused by the failure of the South Fork Dam, which resulted in a massive release of water that swept through the town.
While the flood caused significant destruction, it did not completely level over four square miles of the town.
Many buildings and structures were damaged or destroyed, but not the entire town.