It is contracting. It is expanding. Only the rim is expanding. Only the center is contracting.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: According to the Big Bang Theory, how is the universe changing?
Possibilities:
- It is contracting.
- It is expanding.
- Only the rim is expanding.
- Only the center is contracting.

It is expanding.