Paper Production in 1200s Europe

The correct answer is D) rags.

During the 1200s, people in Europe primarily used rags made from old linen and cotton fabrics to make paper. This method allowed for the recycling of materials that were otherwise discarded, and it contributed to the development of the paper-making industry in Europe, which became more widespread with the introduction of paper mills. If you have more questions or need further assistance, feel free to ask!