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题目材料：
DIRECTION:
Each of the following groups of statements includes ONE main idea and two supporting details.
Please mark on the statement this is the main idea.
Group 10
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A.A. An explosive volcano in Columbia caused mudslides that killed over 20,000 people in 1985.
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B.A. In 79 A.D., several Roman cities were buried after the eruption of Mt. Vesuvius.
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C.A. The eruption of a volcano can be one of the most destructive natural events on the planet.
C显示答案
