Some Scientists Think That Yellowstone Could Cause a Future Disaster

Multiple Choice

Some scientists think that Yellowstone could cause a future disaster because

A) the area is part of a caldera.
B) magma is still present at depth.
C) past eruptions from Yellowstone carried ash over a huge area of western North America.
D) land near Yellowstone is uplifting in some places and subsiding in others.
E) All of these are correct.