PLZ HELP :(Which version of the sentence is most precise?


The principle upon which this company was founded is sound.

The company was founded upon a sound principle.

The company, which was founded upon a principle, is sound.

Soundness is a principle upon which this company was founded.

Verified Answer :

The answer is the second one "the company was founded upon a sound principal."

I agree with the person above - the most correct sentence which is most precise is the second one: The company was founded upon a sound principle. 
The other sentences are longer and not precise enough.