The correct order of the statements is:
1. Farmers begin using iron plows;
2. Farmers begin to use crop rotation;
3. The supply of grain and food increases;
4. Trade grows;
5. Europe's population increases dramatically;
Once the farmers started using iron plows, they were able to work on their land much more efficiently and easily. Because of this, they were producing more. As they were producing more, the land was spent, so they started to rotate the crops in order to allow the land to recuperate. Because of this, the production, thus the supply as well, of grain and food was constantly increasing. The much increased production of grain and food led to growth in the trade. As the trade was growing, the people were becoming financially stronger and more stable, which resulted in rapid population growth on the European continent.
