Final answer:
Tectonic plates move at a slow rate, not measured in feet, but in centimeters per year. Plate tectonics is the theory that explains this movement.
Option A.
Step-by-step explanation:
Tectonic plates do indeed move, but the distance they move in a year is not measured in feet, but rather in centimeters.
Plate tectonics is the theory that explains how these slow movements within the Earth's mantle cause the large segments of the crust, or tectonic plates, to shift and move.
The average speed of tectonic plates is typically measured in millimeters to a few centimeters per year, similar to the rate at which fingernails grow.