In recent years, the climate in North Asia has been generally cooler. However, during the period when the average daily temperature and humidity in North Asia were slightly higher than normal, the yield of crops grown there increased significantly. In the next century, there The increased daily average temperature and humidity obtained over a period of time is expected to become normal in the next century; however, scientists predict that annual crop yields will decline in most areas in the next century. Which of the following points, if correct, can best help resolve the contradictions in the above information? ['even if the average daily temperature and humidity in South Asia have increased from now, the crop output there is expected to remain unchanged.', 'the special variety of North Asian crops determines that they grow better in natural conditions with higher warmth and humidity.', 'In many parts of Asia, abundant rainfall and warm climates are a natural advantage for dealers to grow.', 'the climate is too cold and dry, making many crop pests unable to grow on a large scale.']