The universe is constantly growing and changing. A great explosion caused the origin of the universe. The nature of the universe has always been the same. Light moving from the center of the universe appears red.
I gave my students this multiple choice question: Which of the following is a characteristic of the "steady state theory" of the universe?

Only one answer is correct among these 4 choices:
- The universe is constantly growing and changing.
- A great explosion caused the origin of the universe.
- The nature of the universe has always been the same.
- Light moving from the center of the universe appears red.

Could you tell me which one is correct?

The nature of the universe has always been the same.