Many different localities are thought to be hotspots, found overlying mantle plumes, although scientists cannot agree on a definitive list. Some scientists suggest that many plumes exist, whereas others suggest that there are none. Which of these is used to support the Plume Hypothesis? A) formation of oceanic crust
B) movement of continental plates
C) earthquakes and seismic activity
D) anomalous volcanoes such as those in Hawaii