Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — United States of America
Concept & Option Breakdown
Standard Reference VerifiedMount St. Helens is an active stratovolcano located in the Cascade Range in Washington State, USA. It is famous for its major catastrophic explosive eruption on May 18, 1980.
Mount St. Helens is part of the Pacific Northwest Cascade Volcanic Arc in the United States.
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