There are places on the surface of the Earth where two tectonic plates slide against each other, moving in opposite directions.
Sometimes these plates become stuck and don't move for long
periods of time, which causes a lot of energy to build between the two
plates until there is too much energy and the plates slip, causing a sudden motion. What is the result of this sudden motion?

A. mountains
B. earthquakes
C. volcanoes
D. large valleys