Some scientists think that Yellowstone could cause a future disaster because
A. land near Yellowstone is uplifting in some places and subsiding in others.
B. past eruptions from Yellowstone carried ash over a huge area of western North America.
C. scientists think that magma is still present at depth.
D. the area is part of a caldera.
E. All of these choices are correct.
Answer: E
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The Western United States has been exceptionally dry over:
a. the past 100 years b. the past 50 years c. the past year d. the past 10 years
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