Question: Which statement best describes the Law of Superposition?

What is the correct answer to the question from the following choices?
OPTIONS:
- Each sedimentary layer of rock represents 1,000 years of Earth's age, much like the rings of a tree.
- In undisturbed layers of sedimentary rock, the upper rock layers are older than the lower rock layers.
- In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
- Rocks that form near volcanoes are older than surrounding rock.
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.