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.According to the article about Mt. Pinatubo’s eruption, what caused thousands of roofs to collapse?