Answer: d. extended their reach throughout the world
Step-by-step explanation:
Multinational corporation simply refers to a big corporation that is incorporated in a particular country but sells its product to other countries.
During the 1920s, it should be noted that American multinational corporations extended their reach thworld roughout the world. They produced in a large size and sold to different countries and these activities were controlled by the parent company by the parent company which was in the United States.