The correct answer is D) International economic development agencies harm poorer nations by encouraging to serve them as exporters to wealthier nations.
The critique of US economic policy that this protestor sign is making is " International economic development agencies harm poorer nations by encouraging to serve them as exporters to wealthier nations."
The sign is referring to a real situation in the global economic scene. The WTO, the World Trade Organization has not done much to really help underdeveloped nations to really develop its industrial capacity to not depend so much on raw materials that are exported to wealthier countries. Trade most of the time is not so fair. Rich nations take advantage of the raw materials and natural resources underdevelopment countries have, and they buy the goods at affordable prices but the industry and economies of these poor countries do not improve. They are still depending on the exportation of raw materials. That is why they're still living in poverty with no grow at all.