Answer:
The correct answer would be option D, Sales of at least one million dollars per year.
Explanation:
A multinational corporation is a business entity which operates in another country other than its own home country. Multinational corporations are also called the worldwide enterprises. These corporations owns and control the production process of its goods or services in other countries.
International Sales, Nationality mix of managers and owners, operations in more than one country are some features of a multinational corporation. But generating or maintaining sales of at least one million dollars per year is not a feature compulsory to start a multinational corporation.