Answer:
The correct answer is letter "A": Global strategy.
Explanation:
There are three (3) main approaches used to engage in international businesses: global strategy, multidomestic strategy, and transnational strategy. With the global strategy firms offer the same product or service with few to no modifications everywhere they have a presence. With the multidomestic strategy companies shape their products according to the region of operations. Finally, the transnational strategy is a midterm between the global and multidomestic strategy.
Thus, the easiest approach to implement is the global strategy since it demands a few changes in the company's operations regardless of the region where they conduct businesses.