A Number of Cross-Cultural Studies of Mathematical Aptitude Have Compared

A number of cross-cultural studies of mathematical aptitude have compared the performance of North American students with that of Asian students.Compared to their age-mates from Asian cultures,how do North American Grade 1 students perform?

A) much worse, and the difference in performance becomes more pronounced by Grade 5
B) at the same level, but by Grade 5 North American students are generally performing at a lower level
C) at a higher level, and the difference in performance becomes more pronounced by Grade 5
D) much worse, but by Grade 5 differences in performance are no longer evident