Earthquakes and volcanoes are caused by geological events and have much in common. Which of the following is true about both earthquakes and volcanoes?
A. Volcanic activity may cause earthquakes.
B. Earthquakes are pretty common, but volcanic eruptions are rare events.
C. Earthquakes and volcanic eruptions tend to occur most frequently in the center of a tectonic plate.
D. Tectonic plate movement plays a role in the formation of volcanoes, but has nothing to do with the strength of earthquakes.