According to the Authors of the Text,what Can Be Concluded

According to the authors of the text,what can be concluded regarding the historical and cultural factors that influence the phase of development we call adolescence?

A) Adolescence is a universal phase of life that is experienced similarly across many eras and cultures.
B) Adolescence is universally a difficult period of transition to adulthood.
C) Adolescence as viewed by modern Western standards is a positive change that would benefit teens of all cultures.
D) Adolescence, like many other areas of development, differs markedly depending on culture and era in history.