Which of the following events would most likely produce an earthquake?

A.
At transform plate boundaries, tectonic plates rub against each other with great force.
B.
During flooding, water exerts pressure on the land, causing wide cracks in the ground.
C.
During thunderstorms, lightning generates shocks that pass through the Earth’s crust.
D.
Along mountain slopes, heavy rocks fall, creating shocks that travel through the land.