Which of the Following MOST Accurately Summarizes the Findings of Cross-Cultural

Multiple Choice

Which of the following MOST accurately summarizes the findings of cross-cultural studies of cognitive development?

A) Concrete operations are not universal.
B) Concrete operations appear universal but are affected by variations in task familiarity.
C) The ability to perform concrete operational tasks is unaffected by variations in culture.
D) Only children who have been to school can successfully solve concrete operational problems.