Which of These Statements About Emerging Adulthood, the Developmental Period

Which of these statements about emerging adulthood, the developmental period between adolescence and adulthood, is true?

A) It exists in nearly all cultures that anthropologists have studied.
B) It is most common in communist and socialist countries.
C) It exists in very few cultures.
D) It exists wherever there is a large discrepancy between the rich and the poor.