The correct answer is D) through a strong work ethic and the use of technology.
The United States increased its productivity through a strong work ethic and the use of technology.
Productivity is to create more things with fewer resources in order to have better income and greater profit. This is the main goal of businesses. The United States increased its productivity through a strong work ethic and the use of technology. That is why the U.S. has become a powerful country and a dominant nation in the world scene. A strong work ethic that demands the best in people and effective use of technology to maximize the production process from the very beginning to the end result.