Robert Wade notes that countries stuck in the middle-income trap often have a more diversified set of exports compared to countries which escaped this trap. Why does he argue countries which escaped the middle-income trap have less diversified trade? Group of answer choices Successful countries benefited from the economic crises of wealthier countries Successful countries moved away from exporting agricultural goods towards manufacturing and services Successful countries allowed higher levels of foreign ownership of manufacturing activities Successful countries specialized in exports from sectors where higher value-added upgrading inside the country was possible