Achievement and success is a basic value or values of the United States.
Option A
Explanation:
Americans were always idealistic. They set a high standard and firmly believe that values are real, essential and attractive. While Americans do not always live up to these principles or fundamental values, they still stick to them as a collection of basic values on which the United States government has been built and still operates today.
Americans are highly competitive, which could be a big motivator, but many Americans today are super competitive.
Such kinds of thoughts will lead to anxiety and depression, and eating disorders. Nowadays, their educational system, their appetite for riches and their desires to exceed their competitors make successes and productive as an American value apparent.