Where do most of Earth’s earthquakes, volcanoes, and mountain buildings occur? A) At plate boundaries
B) In the center of oceans
C) At volcanic island arcs
D) In the Andes

Plz answer ! find the alps. what countries and country borders intersect this major mountain range? which borders seem to be defined by the edges of the mountains? which borders seem to be defined by the edges of the mountains? which borders cut across the mountains?