Jeffrey Arnett, the Psychologist Who Created the Term Emerging Adulthood

Jeffrey Arnett, the psychologist who created the term emerging adulthood, believes that the developmental period between adolescence and adulthood (emerging adulthood) :

A) exists in all cultures.
B) exists in almost every culture.
C) exists in very few cultures.
D) exists wherever there is a large discrepancy between the rich and the poor.