Which of the following encompasses all activities needed to create and sell goods and services across national borders?

The concept of international business encompasses all activities required to create and sell goods and services across national borders, making it a broad and vital field in the global economy. It includes various aspects such as exporting, importing, foreign direct investment, and cross-border trade. This means that companies engaged in international business must navigate different legal regulations, cultural differences, and economic environments that vary from one country to another.

While domestic business refers to activities within a single country, it does not account for any operations in foreign markets. Regional business can imply operations within a specific geographic area but may not necessarily involve cross-border trade. Trade intervention typically refers to government actions to influence trade policies, tariffs, or regulations, rather than the overall process of creating and selling goods internationally. Thus, international business is the correct choice, as it fully captures the essence of commercial activities that transcend national boundaries.