Why are some economists concerned with the mischaracterization of trade flow data? Part 2 A. It masks information on whether firms in developing countries are participating in the value chains of multinational companies. B. It does not paint an accurate picture of trade flows and may contribute to greater trade tensions between low-wage exporting countries and high-wage importing countries. C. It masks whether developing countries are moving up into areas of increasing technological sophistication. D. All of the above are reasons some economists are concerned about trade flow data