Final answer:
The correct answer is A. developed; increasing, reflecting that exporting goods from developing to developed countries has been a rising trend over the past 35 years.
Step-by-step explanation:
The correct answer to the student's question 'More than one-half of the exports from developing countries go to developed countries, and this proportion has been increasing over the past 35 years' is A. developed; increasing. Economies in developing countries have been increasingly integrated into the global economy, often exporting goods to economically developed countries, where demand is high for their products. Over time, the export/GDP ratio has risen, indicating that trade has become more significant to these countries' economies. This trend reflects a growing interdependence where developing countries supply goods to more industrialized nations, taking advantage of trade to boost their economic growth.
Additionally, Table 1.2 mentioned in our reference materials indicates that many medium and low income countries like Mexico and China have been participating more actively in global trade. As economies have opened up and reforms have been implemented, there has been a noticeable shift in labor from sectors like agriculture to more productive ones like manufacturing, which are often export-driven and cater to the demands of economically developed countries.