Answer:
It used unfair practices that limited competition.
Explanation:
The second sentence is typically always your support
Answer:
Personally I think the 3rd one would be the best revised
Explanation: While the others are well put this one puts everything into correct context and where it makes the most sense.
Again not 100% sure been awhile since I took English, but it sounds right to me.
He's a commander in the navy.
