The theory of evolution states that complex life forms evolved from simple organisms. which of these statements best validates the theory?

The possible answers are :
The theory was discussed in a science meeting.
The theory was published by a research scholar.
Historians have recorded details of the theory.
Scientists have studied and agreed upon the theory.

The correct answer is: Scientists have studied and agreed upon the theory.
In order for a scientific theory to be accepted in the scientific community and presented to the general public, it needs to be reviewed, discussed and confirmed by other scientists that are expert in the same filed.