Why do many developing countries refuse to engage in international trade agreements with the United States as long as America provides subsidies to its farmers?

a. The European Union refuses to provide subsidies to farmers, so the U.S. subsidies upset the balance of trade.
b. They believe their farmers should get the subsidies, because those farmers need more help than U.S. farmers do.
c. The subsidies go to small family farms that do not deal internationally, rather than the agribusinesses that trade with developing countries.
d. They believe the subsidies give U.S. farmers unfair advantages in international markets.

d