Which of the following best describes the function of the Common Agricultural Policy?

The Common Agricultural Policy (CAP) is primarily designed to provide support and regulation for farmers within the European Union. Its main objectives include increasing agricultural productivity, ensuring a fair standard of living for farmers, stabilizing markets, and ensuring a sustainable agricultural system that can provide food security for EU citizens. By focusing on the welfare of farmers and the agricultural industry, it directly impacts their operations, income, and the broader rural economy within the EU. This alignment with agricultural interests establishes why this choice is the best descriptor of the CAP's function.

In contrast, other options do not accurately reflect the primary purpose of the CAP, which is centered on agriculture and not on broader international trade regulations, non-agriculture industries, or urban development initiatives. The CAP's scope is quite specific and aims at addressing the needs of the agricultural sector, making its impact on farmers the most relevant choice.