Multinational corporations (MNCs) are defined as:

Multinational corporations (MNCs) are specifically defined as businesses that have operations in multiple countries. This definition highlights the global nature of MNCs, which conduct business activities across national borders, whether it be through subsidiaries, joint ventures, or other forms of strategic collaboration. The essence of an MNC lies in its ability to manage and coordinate production, marketing, and other business operations in various countries, taking advantage of diverse markets and resources.

In contrast to the other options, which depict different business structures or characteristics, the focus of an MNC is on geographic diversity and operational reach. Companies operating in just one country do not meet the criteria for being multinational, as their business activities are limited to a single market. Non-profit organizations, while they may operate internationally, do not fit the definition of MNCs since the term is commonly associated with profit-driven enterprises. Lastly, the description of a business with a global influence is too broad and does not capture the operational aspect critical to the definition of an MNC, as influence can arise from various types of organizations, not only those that operate across multiple countries.