The earth processes that can cause a tsunami to develop. The average speed of a tsunami.
A) Earthquakes, volcanic eruptions, underwater landslides, 500-600 miles per hour
B) Hurricanes, tornadoes, thunderstorms, 50-100 miles per hour
C) Tornadoes, volcanic eruptions, avalanches, 1000-1200 miles per hour
D) Earthquakes, hurricanes, tornadoes, 20-30 miles per hour