The world trading system can be characterized as a combination of "levers" and "ratchets." In this analogy the "levers" represent A$.$ the implementation of binding tariffs which prevent backsliding. B$.$ international trade negotiations that push trade liberalization forward. C$.$ "sticks" that punish undesired behavior.The world trading system can be characterized as a combination of "levers" and "ratchets." In this analogy the "levers" represent