Answer: Going to be refined by further investigation.
Step-by-step explanation:
A scientific theory can be define as the explanation of the cause of the natural phenomena or event. It is based upon the data that is obtained after the experimental procedure. It is typically tested repeatedly and verified on the basis of implementation of a suitable scientific methodology. It is supported by observations, measurements and analysis of data obtained after the implementation of the scientific process.
The content of the scientific theory remains changed on the basis of new findings and investigations.
On the basis of the above explanation, Going to be refined by further investigation. is the correct option.