Final answer:
Apple Inc. achieves a sustainable competitive advantage by utilizing the concept of comparative advantage in global production, focusing on design and engineering in the United States, assembly in China, and component production in Korea.
Step-by-step explanation:
Apple Inc.'s strategy for sustainable competitive advantage lies in its ability to leverage the concept of comparative advantage in global production. The company designs and engineers the iPhone in the United States, taking advantage of the country's comparative advantage in high-tech product design and marketing. China, with its skilled labor force, has a comparative advantage in assembling the phone, while Korea focuses on producing components. By leveraging the strengths of different countries, Apple benefits from lower costs and higher quality products, leading to a sustainable competitive advantage.