I think it is C. I hope I helped.
D is the wrong answer. New information does often completely change the theory. Its hard to change something and leave the major theory intact.
The Answer is C. the distance light travels in a year
I believe the answer to your question is “Lithosphere plate boundaries”
The planet Earth is covered by a layer formed by land and rocks called the earth's crust or lithosphere. This crust is not smooth and uniform, but rather irregular and composed of tectonic plates, also called lithosphere plates. These plates are not fixed as they are under the magma (high temperature molten rock).
Hope this helps!:)
