What General Patterns Have Been Discovered by Cross-Cultural Researchers Studying

What general patterns have been discovered by cross-cultural researchers studying temperament?

A) More infants in the United States are classified as insecurely attached than in Asia or Russia.
B) Asian and Russian children are less likely to display positive emotions than infants in the Unites States
C) U.S.children are more likely to be classified as difficult, Asian children are most likely to be classified as easy, and Russian children are most likely to be classified as slow-to- warm-up.
D) The temperamental patterns that have been identified by Thomas, Chess, and Kagan are culturally universal.