It is replaced. It is modified. It becomes law. It becomes suspect.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: There are several theories that exist concerning the way dinosaurs became extinct. If new evidence is found that appears to challenge a particular theory on dinosaur extinction, what happens to the old theory?
Possibilities:
- It is replaced.
- It is modified.
- It becomes law.
- It becomes suspect.

It is modified.