What three tests must all theories pass to be considered a "proven" theory?

 In order to become a scientific theory the three categories that it must pass are the following: 

1) Can the phenomena be recreated in a laboratory setting? 

2) Can variables be changed, yet still result in like observations? 

3) Is the phenomena truly natural or was it the result of a man-made force enacting upon it?

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

just did the assignment and the answer was #1 +2 n