Answer:
C. international strategy.
Step-by-step explanation:
There are several business strategies been used different corporate to survive and grow in various business condition.
International strategy is one of the business strategies that involve the adaptation of foreign policies and selling goods and services at the International market with some local customization to the product. When a firm pursues an international strategy, the head office of the firm retains fairly tight control over marketing and product strategy. Each subsidiary of the company, which is spread all over the world has independent operations with the least interference from the parent company.
In the given case, Xerox had a monopoly on photocopier technologies as they are protected by strong patents, which is their international strategy.