According to the article about mt. pinatubo’s eruption, what caused thousands of roofs to collapse? a. the eruption triggered an earthquake, which caused roofs to collapse. b. the violent shaking of the eruption caused roofs to collapse. c. the ash mixed with the typhoon’s rain became too heavy for roofs to support. d. the eruption spewed out large rocks, which landed on roofs and caused them to collapse.

C. The ash mixed with the typhoon’s rain became too heavy for roofs to support.

After Mount Pinatubo's cataclysmic eruption (1991), heavy rains made the ash heavy enough to make thousands of roofs fall because of the weight.   Monsoon and typhoon rains got the ash deposits from the eruption remobilized to create colossal mudflows of volcanic materials which have produced further damage than the eruption itself.

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