Which of the following statements best summarizes the main points of the passage? A There are three types of plate boundaries: divergent, convergent, and transform. B In 2011, an earthquake measuring 8.9 on the Richter scale shook the ocean floor. It made a giant wave which grew up to 30 feet (9.14 meters) tall. C Tectonic plates have always moved and always will. D Scientists study plate boundaries in order to understand tectonic movement, understand more about how plate movements can result in earthquakes, tsunamis, and volcanic eruptions, and explore how to predict these events.