The correct answer is to redress.
To redress means to remedy or set right. The synonyms of redress are: to correct, put right, repair, fix, reform, improve, better.
As a noun redress means remedy or compensation for a wrong or a grievance.
In the phrase redress the balance, the word redress means to restore equality in a situation.
Anti-trust is the preventing or controlling trusts or other monopolies.
Abridging means to shorten a piece of writing or to curtail something.