Volcanoes sometimes form at hot spots far away from tectonic plate boundaries. Examples include the Hawaiian Islands and the Yellowstone Caldera in North America. These hot spots form where
A.
where an isolated body of magma moves downward into the Earth's interior.
B.
where lava travels thousands of kilometers from the nearest plate boundary.
C. where ash settles from volcanoes erupting at the nearest plate boundary.
D.
an isolated body of magma rises upward toward Earth's surface.