Which of the Following Best Summarizes the Findings of Stevenson's

Which of the following best summarizes the findings of Stevenson's research comparing children's academic achievement in the United States,Japan,Taiwan,and China?

A) Children from the United States outperformed children in all other countries studied.
B) Few differences in achievement were noted between any of the countries studied.
C) Children from the United States performed worse than did children in the other countries on math, but performed better at all other subjects than did children in the other countries.
D) Children from the United States showed poorer academic performance in many subject areas, and were particularly poor at math.