Which of the Following Does NOT Explain Why Children at East

Which of the following does NOT explain why children at East Asian schools tend to do better at math than children at American schools?

A) East Asian mothers spend more time teaching their kids math before their kids start kindergarten.
B) East Asian students are at school for more hours per year than American children.
C) East Asian mothers tend to demand higher standards of achievement than American mothers.
D) East Asian teachers tend to use more concrete examples when teaching math than American teachers.
E) East Asian children get more math homework than American children.