A marine volcanic mountain forms within 100 miles of a coastline. Which of the following descriptions best explains how this volcano formed and erupted? A)Less dense oceanic crust is drawn under more dense continental crust, where it melts and flows upward through the continental crust.

B)Two plates of equal density slide past each other. The friction builds up and heats the minerals in the Earth's crust which flows up between the two plates.

C) Dense continental crust sinks under less dense continental crust, where it melts and flows upward.